ALSA: Kill snd_assert() in sound/core/*

Kill snd_assert() in sound/core/*, either removed or replaced with
if () with snd_BUG_ON().

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

41 files changed, 581 insertions, 388 deletions

diff --git a/sound/core/control.c b/sound/core/control.c
index 281b2e2ef0e..3c5e746d619 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -139,7 +139,8 @@ void snd_ctl_notify(struct snd_card *card, unsigned int mask,
         struct snd_ctl_file *ctl;
         struct snd_kctl_event *ev;
         
-        snd_assert(card != NULL && id != NULL, return);
+        if (snd_BUG_ON(!card || !id))
+                return;
         read_lock(&card->ctl_files_rwlock);
 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
         card->mixer_oss_change_count++;
@@ -188,8 +189,8 @@ static struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol *control,
         struct snd_kcontrol *kctl;
         unsigned int idx;
         
-        snd_assert(control != NULL, return NULL);
-        snd_assert(control->count > 0, return NULL);
+        if (snd_BUG_ON(!control || !control->count))
+                return NULL;
         kctl = kzalloc(sizeof(*kctl) + sizeof(struct snd_kcontrol_volatile) * control->count, GFP_KERNEL);
         if (kctl == NULL) {
                 snd_printk(KERN_ERR "Cannot allocate control instance\n");
@@ -218,8 +219,8 @@ struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new *ncontrol,
         struct snd_kcontrol kctl;
         unsigned int access;
         
-        snd_assert(ncontrol != NULL, return NULL);
-        snd_assert(ncontrol->info != NULL, return NULL);
+        if (snd_BUG_ON(!ncontrol || !ncontrol->info))
+                return NULL;
         memset(&kctl, 0, sizeof(kctl));
         kctl.id.iface = ncontrol->iface;
         kctl.id.device = ncontrol->device;
@@ -315,8 +316,8 @@ int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
 
         if (! kcontrol)
                 return err;
-        snd_assert(card != NULL, goto error);
-        snd_assert(kcontrol->info != NULL, goto error);
+        if (snd_BUG_ON(!card || !kcontrol->info))
+                goto error;
         id = kcontrol->id;
         down_write(&card->controls_rwsem);
         if (snd_ctl_find_id(card, &id)) {
@@ -367,7 +368,8 @@ int snd_ctl_remove(struct snd_card *card, struct snd_kcontrol *kcontrol)
         struct snd_ctl_elem_id id;
         unsigned int idx;
 
-        snd_assert(card != NULL && kcontrol != NULL, return -EINVAL);
+        if (snd_BUG_ON(!card || !kcontrol))
+                return -EINVAL;
         list_del(&kcontrol->list);
         card->controls_count -= kcontrol->count;
         id = kcontrol->id;
@@ -487,7 +489,8 @@ struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card, unsigned int numi
 {
         struct snd_kcontrol *kctl;
 
-        snd_assert(card != NULL && numid != 0, return NULL);
+        if (snd_BUG_ON(!card || !numid))
+                return NULL;
         list_for_each_entry(kctl, &card->controls, list) {
                 if (kctl->id.numid <= numid && kctl->id.numid + kctl->count > numid)
                         return kctl;
@@ -514,7 +517,8 @@ struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card,
 {
         struct snd_kcontrol *kctl;
 
-        snd_assert(card != NULL && id != NULL, return NULL);
+        if (snd_BUG_ON(!card || !id))
+                return NULL;
         if (id->numid != 0)
                 return snd_ctl_find_numid(card, id->numid);
         list_for_each_entry(kctl, &card->controls, list) {
@@ -647,7 +651,7 @@ static int snd_ctl_elem_info(struct snd_ctl_file *ctl,
 #endif
         result = kctl->info(kctl, info);
         if (result >= 0) {
-                snd_assert(info->access == 0, );
+                snd_BUG_ON(info->access);
                 index_offset = snd_ctl_get_ioff(kctl, &info->id);
                 vd = &kctl->vd[index_offset];
                 snd_ctl_build_ioff(&info->id, kctl, index_offset);
@@ -1160,7 +1164,8 @@ static long snd_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg
 
         ctl = file->private_data;
         card = ctl->card;
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
         switch (cmd) {
         case SNDRV_CTL_IOCTL_PVERSION:
                 return put_user(SNDRV_CTL_VERSION, ip) ? -EFAULT : 0;
@@ -1222,7 +1227,8 @@ static ssize_t snd_ctl_read(struct file *file, char __user *buffer,
         ssize_t result = 0;
 
         ctl = file->private_data;
-        snd_assert(ctl != NULL && ctl->card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!ctl || !ctl->card))
+                return -ENXIO;
         if (!ctl->subscribed)
                 return -EBADFD;
         if (count < sizeof(struct snd_ctl_event))
@@ -1328,7 +1334,8 @@ static int _snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn,
 {
         struct snd_kctl_ioctl *p;
 
-        snd_assert(fcn != NULL, return -EINVAL);
+        if (snd_BUG_ON(!fcn))
+                return -EINVAL;
         down_write(&snd_ioctl_rwsem);
         list_for_each_entry(p, lists, list) {
                 if (p->fioctl == fcn) {
@@ -1404,9 +1411,11 @@ static int snd_ctl_dev_register(struct snd_device *device)
         int err, cardnum;
         char name[16];
 
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
         cardnum = card->number;
-        snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
+        if (snd_BUG_ON(cardnum < 0 || cardnum >= SNDRV_CARDS))
+                return -ENXIO;
         sprintf(name, "controlC%i", cardnum);
         if ((err = snd_register_device(SNDRV_DEVICE_TYPE_CONTROL, card, -1,
                                        &snd_ctl_f_ops, card, name)) < 0)
@@ -1423,9 +1432,11 @@ static int snd_ctl_dev_disconnect(struct snd_device *device)
         struct snd_ctl_file *ctl;
         int err, cardnum;
 
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
         cardnum = card->number;
-        snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
+        if (snd_BUG_ON(cardnum < 0 || cardnum >= SNDRV_CARDS))
+                return -ENXIO;
 
         down_read(&card->controls_rwsem);
         list_for_each_entry(ctl, &card->ctl_files, list) {
@@ -1469,7 +1480,8 @@ int snd_ctl_create(struct snd_card *card)
                 .dev_disconnect = snd_ctl_dev_disconnect,
         };
 
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
         return snd_device_new(card, SNDRV_DEV_CONTROL, card, &ops);
 }
 
diff --git a/sound/core/control_compat.c b/sound/core/control_compat.c
index 6101259ad86..368dc9c4aef 100644
--- a/sound/core/control_compat.c
+++ b/sound/core/control_compat.c
@@ -398,7 +398,8 @@ static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, uns
         int err;
 
         ctl = file->private_data;
-        snd_assert(ctl && ctl->card, return -ENXIO);
+        if (snd_BUG_ON(!ctl || !ctl->card))
+                return -ENXIO;
 
         switch (cmd) {
         case SNDRV_CTL_IOCTL_PVERSION:
diff --git a/sound/core/device.c b/sound/core/device.c
index 202dac0e4d8..c58d8227254 100644
--- a/sound/core/device.c
+++ b/sound/core/device.c
@@ -45,9 +45,8 @@ int snd_device_new(struct snd_card *card, snd_device_type_t type,
 {
         struct snd_device *dev;
 
-        snd_assert(card != NULL, return -ENXIO);
-        snd_assert(device_data != NULL, return -ENXIO);
-        snd_assert(ops != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card || !device_data || !ops))
+                return -ENXIO;
         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
         if (dev == NULL) {
                 snd_printk(KERN_ERR "Cannot allocate device\n");
@@ -80,8 +79,8 @@ int snd_device_free(struct snd_card *card, void *device_data)
 {
         struct snd_device *dev;
         
-        snd_assert(card != NULL, return -ENXIO);
-        snd_assert(device_data != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card || !device_data))
+                return -ENXIO;
         list_for_each_entry(dev, &card->devices, list) {
                 if (dev->device_data != device_data)
                         continue;
@@ -123,8 +122,8 @@ int snd_device_disconnect(struct snd_card *card, void *device_data)
 {
         struct snd_device *dev;
 
-        snd_assert(card != NULL, return -ENXIO);
-        snd_assert(device_data != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card || !device_data))
+                return -ENXIO;
         list_for_each_entry(dev, &card->devices, list) {
                 if (dev->device_data != device_data)
                         continue;
@@ -159,8 +158,8 @@ int snd_device_register(struct snd_card *card, void *device_data)
         struct snd_device *dev;
         int err;
 
-        snd_assert(card != NULL, return -ENXIO);
-        snd_assert(device_data != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card || !device_data))
+                return -ENXIO;
         list_for_each_entry(dev, &card->devices, list) {
                 if (dev->device_data != device_data)
                         continue;
@@ -188,7 +187,8 @@ int snd_device_register_all(struct snd_card *card)
         struct snd_device *dev;
         int err;
         
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
         list_for_each_entry(dev, &card->devices, list) {
                 if (dev->state == SNDRV_DEV_BUILD && dev->ops->dev_register) {
                         if ((err = dev->ops->dev_register(dev)) < 0)
@@ -208,7 +208,8 @@ int snd_device_disconnect_all(struct snd_card *card)
         struct snd_device *dev;
         int err = 0;
 
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
         list_for_each_entry(dev, &card->devices, list) {
                 if (snd_device_disconnect(card, dev->device_data) < 0)
                         err = -ENXIO;
@@ -226,7 +227,8 @@ int snd_device_free_all(struct snd_card *card, snd_device_cmd_t cmd)
         int err;
         unsigned int range_low, range_high;
 
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
         range_low = cmd * SNDRV_DEV_TYPE_RANGE_SIZE;
         range_high = range_low + SNDRV_DEV_TYPE_RANGE_SIZE - 1;
       __again:
diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c
index 6d6589f9389..195cafc5a55 100644
--- a/sound/core/hwdep.c
+++ b/sound/core/hwdep.c
@@ -353,9 +353,10 @@ int snd_hwdep_new(struct snd_card *card, char *id, int device,
                 .dev_disconnect = snd_hwdep_dev_disconnect,
         };
 
-        snd_assert(rhwdep != NULL, return -EINVAL);
-        *rhwdep = NULL;
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
+        if (rhwdep)
+                *rhwdep = NULL;
         hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL);
         if (hwdep == NULL) {
                 snd_printk(KERN_ERR "hwdep: cannot allocate\n");
@@ -374,13 +375,15 @@ int snd_hwdep_new(struct snd_card *card, char *id, int device,
         }
         init_waitqueue_head(&hwdep->open_wait);
         mutex_init(&hwdep->open_mutex);
-        *rhwdep = hwdep;
+        if (rhwdep)
+                *rhwdep = hwdep;
         return 0;
 }
 
 static int snd_hwdep_free(struct snd_hwdep *hwdep)
 {
-        snd_assert(hwdep != NULL, return -ENXIO);
+        if (!hwdep)
+                return 0;
         if (hwdep->private_free)
                 hwdep->private_free(hwdep);
         kfree(hwdep);
@@ -440,7 +443,8 @@ static int snd_hwdep_dev_disconnect(struct snd_device *device)
 {
         struct snd_hwdep *hwdep = device->device_data;
 
-        snd_assert(hwdep != NULL, return -ENXIO);
+        if (snd_BUG_ON(!hwdep))
+                return -ENXIO;
         mutex_lock(&register_mutex);
         if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
                 mutex_unlock(&register_mutex);
diff --git a/sound/core/info.c b/sound/core/info.c
index c67773ad929..527b207462b 100644
--- a/sound/core/info.c
+++ b/sound/core/info.c
@@ -217,7 +217,8 @@ static ssize_t snd_info_entry_read(struct file *file, char __user *buffer,
         loff_t pos;
 
         data = file->private_data;
-        snd_assert(data != NULL, return -ENXIO);
+        if (snd_BUG_ON(!data))
+                return -ENXIO;
         pos = *offset;
         if (pos < 0 || (long) pos != pos || (ssize_t) count < 0)
                 return -EIO;
@@ -258,7 +259,8 @@ static ssize_t snd_info_entry_write(struct file *file, const char __user *buffer
         loff_t pos;
 
         data = file->private_data;
-        snd_assert(data != NULL, return -ENXIO);
+        if (snd_BUG_ON(!data))
+                return -ENXIO;
         entry = data->entry;
         pos = *offset;
         if (pos < 0 || (long) pos != pos || (ssize_t) count < 0)
@@ -614,7 +616,8 @@ int snd_info_card_create(struct snd_card *card)
         char str[8];
         struct snd_info_entry *entry;
 
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
 
         sprintf(str, "card%i", card->number);
         if ((entry = snd_info_create_module_entry(card->module, str, NULL)) == NULL)
@@ -636,7 +639,8 @@ int snd_info_card_register(struct snd_card *card)
 {
         struct proc_dir_entry *p;
 
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
 
         if (!strcmp(card->id, card->proc_root->name))
                 return 0;
@@ -654,7 +658,8 @@ int snd_info_card_register(struct snd_card *card)
  */
 void snd_info_card_disconnect(struct snd_card *card)
 {
-        snd_assert(card != NULL, return);
+        if (!card)
+                return;
         mutex_lock(&info_mutex);
         if (card->proc_root_link) {
                 snd_remove_proc_entry(snd_proc_root, card->proc_root_link);
@@ -671,7 +676,8 @@ void snd_info_card_disconnect(struct snd_card *card)
  */
 int snd_info_card_free(struct snd_card *card)
 {
-        snd_assert(card != NULL, return -ENXIO);
+        if (!card)
+                return 0;
         snd_info_free_entry(card->proc_root);
         card->proc_root = NULL;
         return 0;
@@ -849,7 +855,7 @@ static void snd_info_disconnect(struct snd_info_entry *entry)
                 return;
         list_del_init(&entry->list);
         root = entry->parent == NULL ? snd_proc_root : entry->parent->p;
-        snd_assert(root, return);
+        snd_BUG_ON(!root);
         snd_remove_proc_entry(root, entry->p);
         entry->p = NULL;
 }
@@ -947,7 +953,8 @@ int snd_info_register(struct snd_info_entry * entry)
 {
         struct proc_dir_entry *root, *p = NULL;
 
-        snd_assert(entry != NULL, return -ENXIO);
+        if (snd_BUG_ON(!entry))
+                return -ENXIO;
         root = entry->parent == NULL ? snd_proc_root : entry->parent->p;
         mutex_lock(&info_mutex);
         p = snd_create_proc_entry(entry->name, entry->mode, root);
diff --git a/sound/core/info_oss.c b/sound/core/info_oss.c
index e35789a9275..e4af138d651 100644
--- a/sound/core/info_oss.c
+++ b/sound/core/info_oss.c
@@ -43,8 +43,10 @@ int snd_oss_info_register(int dev, int num, char *string)
 {
         char *x;
 
-        snd_assert(dev >= 0 && dev < SNDRV_OSS_INFO_DEV_COUNT, return -ENXIO);
-        snd_assert(num >= 0 && num < SNDRV_CARDS, return -ENXIO);
+        if (snd_BUG_ON(dev < 0 || dev >= SNDRV_OSS_INFO_DEV_COUNT))
+                return -ENXIO;
+        if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS))
+                return -ENXIO;
         mutex_lock(&strings);
         if (string == NULL) {
                 if ((x = snd_sndstat_strings[num][dev]) != NULL) {
diff --git a/sound/core/init.c b/sound/core/init.c
index df46bbc25dc..8af467df924 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -545,7 +545,8 @@ int snd_card_register(struct snd_card *card)
 {
         int err;
 
-        snd_assert(card != NULL, return -EINVAL);
+        if (snd_BUG_ON(!card))
+                return -EINVAL;
 #ifndef CONFIG_SYSFS_DEPRECATED
         if (!card->card_dev) {
                 card->card_dev = device_create_drvdata(sound_class, card->dev,
diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c
index f5d6d8d1297..4a649976cc8 100644
--- a/sound/core/memalloc.c
+++ b/sound/core/memalloc.c
@@ -67,18 +67,6 @@ struct snd_mem_list {
 /* id for pre-allocated buffers */
 #define SNDRV_DMA_DEVICE_UNUSED (unsigned int)-1
 
-#ifdef CONFIG_SND_DEBUG
-#define __ASTRING__(x) #x
-#define snd_assert(expr, args...) do {\
-        if (!(expr)) {\
-                printk(KERN_ERR "snd-malloc: BUG? (%s) (called from %p)\n", __ASTRING__(expr), __builtin_return_address(0));\
-                args;\
-        }\
-} while (0)
-#else
-#define snd_assert(expr, args...) /**/
-#endif
-
 /*
  *
  *  Generic memory allocators
@@ -111,8 +99,10 @@ void *snd_malloc_pages(size_t size, gfp_t gfp_flags)
         int pg;
         void *res;
 
-        snd_assert(size > 0, return NULL);
-        snd_assert(gfp_flags != 0, return NULL);
+        if (WARN_ON(!size))
+                return NULL;
+        if (WARN_ON(!gfp_flags))
+                return NULL;
         gfp_flags |= __GFP_COMP;        /* compound page lets parts be mapped */
         pg = get_order(size);
         if ((res = (void *) __get_free_pages(gfp_flags, pg)) != NULL)
@@ -152,8 +142,8 @@ static void *snd_malloc_dev_pages(struct device *dev, size_t size, dma_addr_t *d
         void *res;
         gfp_t gfp_flags;
 
-        snd_assert(size > 0, return NULL);
-        snd_assert(dma != NULL, return NULL);
+        if (WARN_ON(!dma))
+                return NULL;
         pg = get_order(size);
         gfp_flags = GFP_KERNEL
                 | __GFP_COMP    /* compound page lets parts be mapped */
@@ -189,8 +179,8 @@ static void *snd_malloc_sbus_pages(struct device *dev, size_t size,
         int pg;
         void *res;
 
-        snd_assert(size > 0, return NULL);
-        snd_assert(dma_addr != NULL, return NULL);
+        if (WARN_ON(!dma_addr))
+                return NULL;
         pg = get_order(size);
         res = sbus_alloc_consistent(sdev, PAGE_SIZE * (1 << pg), dma_addr);
         if (res != NULL)
@@ -236,8 +226,10 @@ static void snd_free_sbus_pages(struct device *dev, size_t size,
 int snd_dma_alloc_pages(int type, struct device *device, size_t size,
                         struct snd_dma_buffer *dmab)
 {
-        snd_assert(size > 0, return -ENXIO);
-        snd_assert(dmab != NULL, return -ENXIO);
+        if (WARN_ON(!size))
+                return -ENXIO;
+        if (WARN_ON(!dmab))
+                return -ENXIO;
 
         dmab->dev.type = type;
         dmab->dev.dev = device;
@@ -292,9 +284,6 @@ int snd_dma_alloc_pages_fallback(int type, struct device *device, size_t size,
 {
         int err;
 
-        snd_assert(size > 0, return -ENXIO);
-        snd_assert(dmab != NULL, return -ENXIO);
-
         while ((err = snd_dma_alloc_pages(type, device, size, dmab)) < 0) {
                 if (err != -ENOMEM)
                         return err;
@@ -353,7 +342,8 @@ size_t snd_dma_get_reserved_buf(struct snd_dma_buffer *dmab, unsigned int id)
 {
         struct snd_mem_list *mem;
 
-        snd_assert(dmab, return 0);
+        if (WARN_ON(!dmab))
+                return 0;
 
         mutex_lock(&list_mutex);
         list_for_each_entry(mem, &mem_list_head, list) {
@@ -387,7 +377,8 @@ int snd_dma_reserve_buf(struct snd_dma_buffer *dmab, unsigned int id)
 {
         struct snd_mem_list *mem;
 
-        snd_assert(dmab, return -EINVAL);
+        if (WARN_ON(!dmab))
+                return -EINVAL;
         mem = kmalloc(sizeof(*mem), GFP_KERNEL);
         if (! mem)
                 return -ENOMEM;
diff --git a/sound/core/oss/copy.c b/sound/core/oss/copy.c
index 9ded30d0e97..05b58d4fc2b 100644
--- a/sound/core/oss/copy.c
+++ b/sound/core/oss/copy.c
@@ -32,17 +32,18 @@ static snd_pcm_sframes_t copy_transfer(struct snd_pcm_plugin *plugin,
         unsigned int channel;
         unsigned int nchannels;
 
-        snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+                return -ENXIO;
         if (frames == 0)
                 return 0;
         nchannels = plugin->src_format.channels;
         for (channel = 0; channel < nchannels; channel++) {
-                snd_assert(src_channels->area.first % 8 == 0 &&
-                           src_channels->area.step % 8 == 0,
-                           return -ENXIO);
-                snd_assert(dst_channels->area.first % 8 == 0 &&
-                           dst_channels->area.step % 8 == 0,
-                           return -ENXIO);
+                if (snd_BUG_ON(src_channels->area.first % 8 ||
+                               src_channels->area.step % 8))
+                        return -ENXIO;
+                if (snd_BUG_ON(dst_channels->area.first % 8 ||
+                               dst_channels->area.step % 8))
+                        return -ENXIO;
                 if (!src_channels->enabled) {
                         if (dst_channels->wanted)
                                 snd_pcm_area_silence(&dst_channels->area, 0, frames, plugin->dst_format.format);
@@ -66,15 +67,20 @@ int snd_pcm_plugin_build_copy(struct snd_pcm_substream *plug,
         struct snd_pcm_plugin *plugin;
         int width;
 
-        snd_assert(r_plugin != NULL, return -ENXIO);
+        if (snd_BUG_ON(!r_plugin))
+                return -ENXIO;
         *r_plugin = NULL;
 
-        snd_assert(src_format->format == dst_format->format, return -ENXIO);
-        snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
-        snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
+        if (snd_BUG_ON(src_format->format != dst_format->format))
+                return -ENXIO;
+        if (snd_BUG_ON(src_format->rate != dst_format->rate))
+                return -ENXIO;
+        if (snd_BUG_ON(src_format->channels != dst_format->channels))
+                return -ENXIO;
 
         width = snd_pcm_format_physical_width(src_format->format);
-        snd_assert(width > 0, return -ENXIO);
+        if (snd_BUG_ON(width <= 0))
+                return -ENXIO;
 
         err = snd_pcm_plugin_build(plug, "copy", src_format, dst_format,
                                    0, &plugin);
diff --git a/sound/core/oss/io.c b/sound/core/oss/io.c
index f874f6ca365..6faa1d71920 100644
--- a/sound/core/oss/io.c
+++ b/sound/core/oss/io.c
@@ -39,14 +39,17 @@ static snd_pcm_sframes_t io_playback_transfer(struct snd_pcm_plugin *plugin,
                                     struct snd_pcm_plugin_channel *dst_channels,
                                     snd_pcm_uframes_t frames)
 {
-        snd_assert(plugin != NULL, return -ENXIO);
-        snd_assert(src_channels != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plugin))
+                return -ENXIO;
+        if (snd_BUG_ON(!src_channels))
+                return -ENXIO;
         if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
                 return pcm_write(plugin->plug, src_channels->area.addr, frames);
         } else {
                 int channel, channels = plugin->dst_format.channels;
                 void **bufs = (void**)plugin->extra_data;
-                snd_assert(bufs != NULL, return -ENXIO);
+                if (snd_BUG_ON(!bufs))
+                        return -ENXIO;
                 for (channel = 0; channel < channels; channel++) {
                         if (src_channels[channel].enabled)
                                 bufs[channel] = src_channels[channel].area.addr;
@@ -62,14 +65,17 @@ static snd_pcm_sframes_t io_capture_transfer(struct snd_pcm_plugin *plugin,
                                    struct snd_pcm_plugin_channel *dst_channels,
                                    snd_pcm_uframes_t frames)
 {
-        snd_assert(plugin != NULL, return -ENXIO);
-        snd_assert(dst_channels != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plugin))
+                return -ENXIO;
+        if (snd_BUG_ON(!dst_channels))
+                return -ENXIO;
         if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
                 return pcm_read(plugin->plug, dst_channels->area.addr, frames);
         } else {
                 int channel, channels = plugin->dst_format.channels;
                 void **bufs = (void**)plugin->extra_data;
-                snd_assert(bufs != NULL, return -ENXIO);
+                if (snd_BUG_ON(!bufs))
+                        return -ENXIO;
                 for (channel = 0; channel < channels; channel++) {
                         if (dst_channels[channel].enabled)
                                 bufs[channel] = dst_channels[channel].area.addr;
@@ -107,9 +113,11 @@ int snd_pcm_plugin_build_io(struct snd_pcm_substream *plug,
         struct snd_pcm_plugin_format format;
         struct snd_pcm_plugin *plugin;
 
-        snd_assert(r_plugin != NULL, return -ENXIO);
+        if (snd_BUG_ON(!r_plugin))
+                return -ENXIO;
         *r_plugin = NULL;
-        snd_assert(plug != NULL && params != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plug || !params))
+                return -ENXIO;
         format.format = params_format(params);
         format.rate = params_rate(params);
         format.channels = params_channels(params);
diff --git a/sound/core/oss/linear.c b/sound/core/oss/linear.c
index da3dbd41669..4c1d1682719 100644
--- a/sound/core/oss/linear.c
+++ b/sound/core/oss/linear.c
@@ -92,7 +92,8 @@ static snd_pcm_sframes_t linear_transfer(struct snd_pcm_plugin *plugin,
 {
         struct linear_priv *data;
 
-        snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+                return -ENXIO;
         data = (struct linear_priv *)plugin->extra_data;
         if (frames == 0)
                 return 0;
@@ -100,12 +101,12 @@ static snd_pcm_sframes_t linear_transfer(struct snd_pcm_plugin *plugin,
         {
                 unsigned int channel;
                 for (channel = 0; channel < plugin->src_format.channels; channel++) {
-                        snd_assert(src_channels[channel].area.first % 8 == 0 &&
-                                   src_channels[channel].area.step % 8 == 0,
-                                   return -ENXIO);
-                        snd_assert(dst_channels[channel].area.first % 8 == 0 &&
-                                   dst_channels[channel].area.step % 8 == 0,
-                                   return -ENXIO);
+                        if (snd_BUG_ON(src_channels[channel].area.first % 8 ||
+                                       src_channels[channel].area.step % 8))
+                                return -ENXIO;
+                        if (snd_BUG_ON(dst_channels[channel].area.first % 8 ||
+                                       dst_channels[channel].area.step % 8))
+                                return -ENXIO;
                 }
         }
 #endif
@@ -154,13 +155,17 @@ int snd_pcm_plugin_build_linear(struct snd_pcm_substream *plug,
         struct linear_priv *data;
         struct snd_pcm_plugin *plugin;
 
-        snd_assert(r_plugin != NULL, return -ENXIO);
+        if (snd_BUG_ON(!r_plugin))
+                return -ENXIO;
         *r_plugin = NULL;
 
-        snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
-        snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
-        snd_assert(snd_pcm_format_linear(src_format->format) &&
-                   snd_pcm_format_linear(dst_format->format), return -ENXIO);
+        if (snd_BUG_ON(src_format->rate != dst_format->rate))
+                return -ENXIO;
+        if (snd_BUG_ON(src_format->channels != dst_format->channels))
+                return -ENXIO;
+        if (snd_BUG_ON(!snd_pcm_format_linear(src_format->format) ||
+                       !snd_pcm_format_linear(dst_format->format)))
+                return -ENXIO;
 
         err = snd_pcm_plugin_build(plug, "linear format conversion",
                                    src_format, dst_format,
diff --git a/sound/core/oss/mixer_oss.c b/sound/core/oss/mixer_oss.c
index 581aa2c60e6..4690b8b5681 100644
--- a/sound/core/oss/mixer_oss.c
+++ b/sound/core/oss/mixer_oss.c
@@ -257,8 +257,10 @@ static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot)
                 result = pslot->get_volume(fmixer, pslot, &left, &right);
         if (!pslot->stereo)
                 right = left;
-        snd_assert(left >= 0 && left <= 100, return -EIO);
-        snd_assert(right >= 0 && right <= 100, return -EIO);
+        if (snd_BUG_ON(left < 0 || left > 100))
+                return -EIO;
+        if (snd_BUG_ON(right < 0 || right > 100))
+                return -EIO;
         if (result >= 0) {
                 pslot->volume[0] = left;
                 pslot->volume[1] = right;
@@ -298,7 +300,8 @@ static int snd_mixer_oss_ioctl1(struct snd_mixer_oss_file *fmixer, unsigned int
         int __user *p = argp;
         int tmp;
 
-        snd_assert(fmixer != NULL, return -ENXIO);
+        if (snd_BUG_ON(!fmixer))
+                return -ENXIO;
         if (((cmd >> 8) & 0xff) == 'M') {
                 switch (cmd) {
                 case SOUND_MIXER_INFO:
@@ -368,7 +371,8 @@ int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned l
 {
         struct snd_mixer_oss_file fmixer;
         
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
         if (card->mixer_oss == NULL)
                 return -ENXIO;
         memset(&fmixer, 0, sizeof(fmixer));
@@ -1284,9 +1288,11 @@ static int snd_mixer_oss_free1(void *private)
         struct snd_card *card;
         int idx;
  
-        snd_assert(mixer != NULL, return -ENXIO);
+        if (!mixer)
+                return 0;
         card = mixer->card;
-        snd_assert(mixer == card->mixer_oss, return -ENXIO);
+        if (snd_BUG_ON(mixer != card->mixer_oss))
+                return -ENXIO;
         card->mixer_oss = NULL;
         for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) {
                 struct snd_mixer_oss_slot *chn = &mixer->slots[idx];
diff --git a/sound/core/oss/mulaw.c b/sound/core/oss/mulaw.c
index 77f96194a0e..f7649d4d950 100644
--- a/sound/core/oss/mulaw.c
+++ b/sound/core/oss/mulaw.c
@@ -252,19 +252,20 @@ static snd_pcm_sframes_t mulaw_transfer(struct snd_pcm_plugin *plugin,
 {
         struct mulaw_priv *data;
 
-        snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+                return -ENXIO;
         if (frames == 0)
                 return 0;
 #ifdef CONFIG_SND_DEBUG
         {
                 unsigned int channel;
                 for (channel = 0; channel < plugin->src_format.channels; channel++) {
-                        snd_assert(src_channels[channel].area.first % 8 == 0 &&
-                                   src_channels[channel].area.step % 8 == 0,
-                                   return -ENXIO);
-                        snd_assert(dst_channels[channel].area.first % 8 == 0 &&
-                                   dst_channels[channel].area.step % 8 == 0,
-                                   return -ENXIO);
+                        if (snd_BUG_ON(src_channels[channel].area.first % 8 ||
+                                       src_channels[channel].area.step % 8))
+                                return -ENXIO;
+                        if (snd_BUG_ON(dst_channels[channel].area.first % 8 ||
+                                       dst_channels[channel].area.step % 8))
+                                return -ENXIO;
                 }
         }
 #endif
@@ -305,11 +306,14 @@ int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *plug,
         struct snd_pcm_plugin_format *format;
         mulaw_f func;
 
-        snd_assert(r_plugin != NULL, return -ENXIO);
+        if (snd_BUG_ON(!r_plugin))
+                return -ENXIO;
         *r_plugin = NULL;
 
-        snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
-        snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
+        if (snd_BUG_ON(src_format->rate != dst_format->rate))
+                return -ENXIO;
+        if (snd_BUG_ON(src_format->channels != dst_format->channels))
+                return -ENXIO;
 
         if (dst_format->format == SNDRV_PCM_FORMAT_MU_LAW) {
                 format = src_format;
@@ -323,7 +327,8 @@ int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *plug,
                 snd_BUG();
                 return -EINVAL;
         }
-        snd_assert(snd_pcm_format_linear(format->format) != 0, return -ENXIO);
+        if (snd_BUG_ON(!snd_pcm_format_linear(format->format)))
+                return -ENXIO;
 
         err = snd_pcm_plugin_build(plug, "Mu-Law<->linear conversion",
                                    src_format, dst_format,
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 4c601b192dd..1af62b8b86c 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -452,7 +452,8 @@ static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
         } else {
                 *params = *save;
                 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
-                snd_assert(max >= 0, return -EINVAL);
+                if (max < 0)
+                        return max;
                 last = 1;
         }
  _end:
@@ -461,7 +462,7 @@ static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
                 v = snd_pcm_hw_param_last(pcm, params, var, dir);
         else
                 v = snd_pcm_hw_param_first(pcm, params, var, dir);
-        snd_assert(v >= 0, return -EINVAL);
+        snd_BUG_ON(v < 0);
         return v;
 }
 
@@ -778,7 +779,8 @@ static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
         while (oss_period_size * oss_periods > oss_buffer_size)
                 oss_period_size /= 2;
 
-        snd_assert(oss_period_size >= 16, return -EINVAL);
+        if (oss_period_size < 16)
+                return -EINVAL;
         runtime->oss.period_bytes = oss_period_size;
         runtime->oss.period_frames = 1;
         runtime->oss.periods = oss_periods;
@@ -895,7 +897,8 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
                 }
         }
         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
-        snd_assert(err >= 0, goto failure);
+        if (err < 0)
+                goto failure;
 
         if (direct) {
                 memcpy(params, sparams, sizeof(*params));
@@ -958,11 +961,13 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 
         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
-        snd_assert(err >= 0, goto failure);
+        if (err < 0)
+                goto failure;
 
         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
                                      runtime->oss.periods, NULL);
-        snd_assert(err >= 0, goto failure);
+        if (err < 0)
+                goto failure;
 
         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 
@@ -1006,7 +1011,10 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 
         runtime->oss.periods = params_periods(sparams);
         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
-        snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
+        if (oss_period_size < 0) {
+                err = -EINVAL;
+                goto failure;
+        }
 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
         if (runtime->oss.plugin_first) {
                 err = snd_pcm_plug_alloc(substream, oss_period_size);
@@ -1017,7 +1025,10 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
         oss_period_size *= oss_frame_size;
 
         oss_buffer_size = oss_period_size * runtime->oss.periods;
-        snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
+        if (oss_buffer_size < 0) {
+                err = -EINVAL;
+                goto failure;
+        }
 
         runtime->oss.period_bytes = oss_period_size;
         runtime->oss.buffer_bytes = oss_buffer_size;
@@ -1069,7 +1080,8 @@ static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_fil
                                 return err;
                 }
         }
-        snd_assert(asubstream != NULL, return -EIO);
+        if (!asubstream)
+                return -EIO;
         if (r_substream)
                 *r_substream = asubstream;
         return 0;
@@ -1764,7 +1776,8 @@ static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
         err = snd_pcm_hw_refine(substream, params);
         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 
         kfree(params);
-        snd_assert(err >= 0, return err);
+        if (err < 0)
+                return err;
         for (fmt = 0; fmt < 32; ++fmt) {
                 if (snd_mask_test(&format_mask, fmt)) {
                         int f = snd_pcm_oss_format_to(fmt);
@@ -2250,7 +2263,8 @@ static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
 {
         int cidx;
-        snd_assert(pcm_oss_file != NULL, return -ENXIO);
+        if (!pcm_oss_file)
+                return 0;
         for (cidx = 0; cidx < 2; ++cidx) {
                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
                 if (substream)
@@ -2271,8 +2285,8 @@ static int snd_pcm_oss_open_file(struct file *file,
         struct snd_pcm_substream *substream;
         unsigned int f_mode = file->f_mode;
 
-        snd_assert(rpcm_oss_file != NULL, return -EINVAL);
-        *rpcm_oss_file = NULL;
+        if (rpcm_oss_file)
+                *rpcm_oss_file = NULL;
 
         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
         if (pcm_oss_file == NULL)
@@ -2312,7 +2326,8 @@ static int snd_pcm_oss_open_file(struct file *file,
         }
 
         file->private_data = pcm_oss_file;
-        *rpcm_oss_file = pcm_oss_file;
+        if (rpcm_oss_file)
+                *rpcm_oss_file = pcm_oss_file;
         return 0;
 }
 
@@ -2321,7 +2336,8 @@ static int snd_task_name(struct task_struct *task, char *name, size_t size)
 {
         unsigned int idx;
 
-        snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
+        if (snd_BUG_ON(!task || !name || size < 2))
+                return -EINVAL;
         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
                 name[idx] = task->comm[idx];
         name[idx] = '\0';
@@ -2415,7 +2431,8 @@ static int snd_pcm_oss_release(struct inode *inode, struct file *file)
         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
         if (substream == NULL)
                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
-        snd_assert(substream != NULL, return -ENXIO);
+        if (snd_BUG_ON(!substream))
+                return -ENXIO;
         pcm = substream->pcm;
         if (!pcm->card->shutdown)
                 snd_pcm_oss_sync(pcm_oss_file);
@@ -2448,7 +2465,8 @@ static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long
                         if (substream != NULL)
                                 break;
                 }
-                snd_assert(substream != NULL, return -ENXIO);
+                if (snd_BUG_ON(idx >= 2))
+                        return -ENXIO;
                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
         }
 #endif
diff --git a/sound/core/oss/pcm_plugin.c b/sound/core/oss/pcm_plugin.c
index bec94138205..6751daa3bb5 100644
--- a/sound/core/oss/pcm_plugin.c
+++ b/sound/core/oss/pcm_plugin.c
@@ -62,7 +62,8 @@ static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t
         if ((width = snd_pcm_format_physical_width(format->format)) < 0)
                 return width;
         size = frames * format->channels * width;
-        snd_assert((size % 8) == 0, return -ENXIO);
+        if (snd_BUG_ON(size % 8))
+                return -ENXIO;
         size /= 8;
         if (plugin->buf_frames < frames) {
                 vfree(plugin->buf);
@@ -84,7 +85,8 @@ static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t
                         c->area.step = format->channels * width;
                 }
         } else if (plugin->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
-                snd_assert((size % format->channels) == 0,);
+                if (snd_BUG_ON(size % format->channels))
+                        return -EINVAL;
                 size /= format->channels;
                 for (channel = 0; channel < format->channels; channel++, c++) {
                         c->frames = frames;
@@ -102,13 +104,15 @@ static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t
 int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames)
 {
         int err;
-        snd_assert(snd_pcm_plug_first(plug) != NULL, return -ENXIO);
+        if (snd_BUG_ON(!snd_pcm_plug_first(plug)))
+                return -ENXIO;
         if (snd_pcm_plug_stream(plug) == SNDRV_PCM_STREAM_PLAYBACK) {
                 struct snd_pcm_plugin *plugin = snd_pcm_plug_first(plug);
                 while (plugin->next) {
                         if (plugin->dst_frames)
                                 frames = plugin->dst_frames(plugin, frames);
-                        snd_assert(frames > 0, return -ENXIO);
+                        if (snd_BUG_ON(frames <= 0))
+                                return -ENXIO;
                         plugin = plugin->next;
                         err = snd_pcm_plugin_alloc(plugin, frames);
                         if (err < 0)
@@ -119,7 +123,8 @@ int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames)
                 while (plugin->prev) {
                         if (plugin->src_frames)
                                 frames = plugin->src_frames(plugin, frames);
-                        snd_assert(frames > 0, return -ENXIO);
+                        if (snd_BUG_ON(frames <= 0))
+                                return -ENXIO;
                         plugin = plugin->prev;
                         err = snd_pcm_plugin_alloc(plugin, frames);
                         if (err < 0)
@@ -148,8 +153,10 @@ int snd_pcm_plugin_build(struct snd_pcm_substream *plug,
         struct snd_pcm_plugin *plugin;
         unsigned int channels;
         
-        snd_assert(plug != NULL, return -ENXIO);
-        snd_assert(src_format != NULL && dst_format != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plug))
+                return -ENXIO;
+        if (snd_BUG_ON(!src_format || !dst_format))
+                return -ENXIO;
         plugin = kzalloc(sizeof(*plugin) + extra, GFP_KERNEL);
         if (plugin == NULL)
                 return -ENOMEM;
@@ -159,10 +166,10 @@ int snd_pcm_plugin_build(struct snd_pcm_substream *plug,
         plugin->access = SNDRV_PCM_ACCESS_RW_INTERLEAVED;
         plugin->src_format = *src_format;
         plugin->src_width = snd_pcm_format_physical_width(src_format->format);
-        snd_assert(plugin->src_width > 0, );
+        snd_BUG_ON(plugin->src_width <= 0);
         plugin->dst_format = *dst_format;
         plugin->dst_width = snd_pcm_format_physical_width(dst_format->format);
-        snd_assert(plugin->dst_width > 0, );
+        snd_BUG_ON(plugin->dst_width <= 0);
         if (plugin->stream == SNDRV_PCM_STREAM_PLAYBACK)
                 channels = src_format->channels;
         else
@@ -194,7 +201,8 @@ snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *plug, snd_p
         struct snd_pcm_plugin *plugin, *plugin_prev, *plugin_next;
         int stream = snd_pcm_plug_stream(plug);
 
-        snd_assert(plug != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plug))
+                return -ENXIO;
         if (drv_frames == 0)
                 return 0;
         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
@@ -224,7 +232,8 @@ snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *plug, snd_pc
         snd_pcm_sframes_t frames;
         int stream = snd_pcm_plug_stream(plug);
         
-        snd_assert(plug != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plug))
+                return -ENXIO;
         if (clt_frames == 0)
                 return 0;
         frames = clt_frames;
@@ -540,7 +549,8 @@ snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *plu
         int width, nchannels, channel;
         int stream = snd_pcm_plug_stream(plug);
 
-        snd_assert(buf != NULL, return -ENXIO);
+        if (snd_BUG_ON(!buf))
+                return -ENXIO;
         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
                 plugin = snd_pcm_plug_first(plug);
                 format = &plugin->src_format;
@@ -553,7 +563,9 @@ snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *plu
         if ((width = snd_pcm_format_physical_width(format->format)) < 0)
                 return width;
         nchannels = format->channels;
-        snd_assert(plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || format->channels <= 1, return -ENXIO);
+        if (snd_BUG_ON(plugin->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
+                       format->channels > 1))
+                return -ENXIO;
         for (channel = 0; channel < nchannels; channel++, v++) {
                 v->frames = count;
                 v->enabled = 1;
diff --git a/sound/core/oss/rate.c b/sound/core/oss/rate.c
index 14dfb3175d8..a466443c4a2 100644
--- a/sound/core/oss/rate.c
+++ b/sound/core/oss/rate.c
@@ -185,7 +185,8 @@ static snd_pcm_sframes_t rate_src_frames(struct snd_pcm_plugin *plugin, snd_pcm_
         struct rate_priv *data;
         snd_pcm_sframes_t res;
 
-        snd_assert(plugin != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plugin))
+                return -ENXIO;
         if (frames == 0)
                 return 0;
         data = (struct rate_priv *)plugin->extra_data;
@@ -217,7 +218,8 @@ static snd_pcm_sframes_t rate_dst_frames(struct snd_pcm_plugin *plugin, snd_pcm_
         struct rate_priv *data;
         snd_pcm_sframes_t res;
 
-        snd_assert(plugin != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plugin))
+                return -ENXIO;
         if (frames == 0)
                 return 0;
         data = (struct rate_priv *)plugin->extra_data;
@@ -252,19 +254,20 @@ static snd_pcm_sframes_t rate_transfer(struct snd_pcm_plugin *plugin,
         snd_pcm_uframes_t dst_frames;
         struct rate_priv *data;
 
-        snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+                return -ENXIO;
         if (frames == 0)
                 return 0;
 #ifdef CONFIG_SND_DEBUG
         {
                 unsigned int channel;
                 for (channel = 0; channel < plugin->src_format.channels; channel++) {
-                        snd_assert(src_channels[channel].area.first % 8 == 0 &&
-                                   src_channels[channel].area.step % 8 == 0,
-                                   return -ENXIO);
-                        snd_assert(dst_channels[channel].area.first % 8 == 0 &&
-                                   dst_channels[channel].area.step % 8 == 0,
-                                   return -ENXIO);
+                        if (snd_BUG_ON(src_channels[channel].area.first % 8 ||
+                                       src_channels[channel].area.step % 8))
+                                return -ENXIO;
+                        if (snd_BUG_ON(dst_channels[channel].area.first % 8 ||
+                                       dst_channels[channel].area.step % 8))
+                                return -ENXIO;
                 }
         }
 #endif
@@ -281,7 +284,8 @@ static int rate_action(struct snd_pcm_plugin *plugin,
                        enum snd_pcm_plugin_action action,
                        unsigned long udata)
 {
-        snd_assert(plugin != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plugin))
+                return -ENXIO;
         switch (action) {
         case INIT:
         case PREPARE:
@@ -302,14 +306,20 @@ int snd_pcm_plugin_build_rate(struct snd_pcm_substream *plug,
         struct rate_priv *data;
         struct snd_pcm_plugin *plugin;
 
-        snd_assert(r_plugin != NULL, return -ENXIO);
+        if (snd_BUG_ON(!r_plugin))
+                return -ENXIO;
         *r_plugin = NULL;
 
-        snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
-        snd_assert(src_format->channels > 0, return -ENXIO);
-        snd_assert(src_format->format == SNDRV_PCM_FORMAT_S16, return -ENXIO);
-        snd_assert(dst_format->format == SNDRV_PCM_FORMAT_S16, return -ENXIO);
-        snd_assert(src_format->rate != dst_format->rate, return -ENXIO);
+        if (snd_BUG_ON(src_format->channels != dst_format->channels))
+                return -ENXIO;
+        if (snd_BUG_ON(src_format->channels <= 0))
+                return -ENXIO;
+        if (snd_BUG_ON(src_format->format != SNDRV_PCM_FORMAT_S16))
+                return -ENXIO;
+        if (snd_BUG_ON(dst_format->format != SNDRV_PCM_FORMAT_S16))
+                return -ENXIO;
+        if (snd_BUG_ON(src_format->rate == dst_format->rate))
+                return -ENXIO;
 
         err = snd_pcm_plugin_build(plug, "rate conversion",
                                    src_format, dst_format,
diff --git a/sound/core/oss/route.c b/sound/core/oss/route.c
index da7ab7a3e82..0dcc2870d53 100644
--- a/sound/core/oss/route.c
+++ b/sound/core/oss/route.c
@@ -54,7 +54,8 @@ static snd_pcm_sframes_t route_transfer(struct snd_pcm_plugin *plugin,
         struct snd_pcm_plugin_channel *dvp;
         int format;
 
-        snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
+        if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+                return -ENXIO;
         if (frames == 0)
                 return 0;
 
@@ -90,10 +91,13 @@ int snd_pcm_plugin_build_route(struct snd_pcm_substream *plug,
         struct snd_pcm_plugin *plugin;
         int err;
 
-        snd_assert(r_plugin != NULL, return -ENXIO);
+        if (snd_BUG_ON(!r_plugin))
+                return -ENXIO;
         *r_plugin = NULL;
-        snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
-        snd_assert(src_format->format == dst_format->format, return -ENXIO);
+        if (snd_BUG_ON(src_format->rate != dst_format->rate))
+                return -ENXIO;
+        if (snd_BUG_ON(src_format->format != dst_format->format))
+                return -ENXIO;
 
         err = snd_pcm_plugin_build(plug, "route conversion",
                                    src_format, dst_format, 0, &plugin);
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 517388b2eba..192a433a240 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -256,7 +256,6 @@ static char *snd_pcm_tstamp_mode_names[] = {
 
 static const char *snd_pcm_stream_name(int stream)
 {
-        snd_assert(stream <= SNDRV_PCM_STREAM_LAST, return NULL);
         return snd_pcm_stream_names[stream];
 }
 
@@ -272,7 +271,6 @@ static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat)
 
 static const char *snd_pcm_tstamp_mode_name(int mode)
 {
-        snd_assert(mode <= SNDRV_PCM_TSTAMP_LAST, return NULL);
         return snd_pcm_tstamp_mode_names[mode];
 }
 
@@ -706,9 +704,10 @@ int snd_pcm_new(struct snd_card *card, char *id, int device,
                 .dev_disconnect = snd_pcm_dev_disconnect,
         };
 
-        snd_assert(rpcm != NULL, return -EINVAL);
-        *rpcm = NULL;
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
+        if (rpcm)
+                *rpcm = NULL;
         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
         if (pcm == NULL) {
                 snd_printk(KERN_ERR "Cannot allocate PCM\n");
@@ -732,7 +731,8 @@ int snd_pcm_new(struct snd_card *card, char *id, int device,
                 snd_pcm_free(pcm);
                 return err;
         }
-        *rpcm = pcm;
+        if (rpcm)
+                *rpcm = pcm;
         return 0;
 }
 
@@ -766,7 +766,8 @@ static int snd_pcm_free(struct snd_pcm *pcm)
 {
         struct snd_pcm_notify *notify;
 
-        snd_assert(pcm != NULL, return -ENXIO);
+        if (!pcm)
+                return 0;
         list_for_each_entry(notify, &snd_pcm_notify_list, list) {
                 notify->n_unregister(pcm);
         }
@@ -797,9 +798,9 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream,
         int prefer_subdevice = -1;
         size_t size;
 
-        snd_assert(rsubstream != NULL, return -EINVAL);
+        if (snd_BUG_ON(!pcm || !rsubstream))
+                return -ENXIO;
         *rsubstream = NULL;
-        snd_assert(pcm != NULL, return -ENXIO);
         pstr = &pcm->streams[stream];
         if (pstr->substream == NULL || pstr->substream_count == 0)
                 return -ENODEV;
@@ -907,8 +908,9 @@ void snd_pcm_detach_substream(struct snd_pcm_substream *substream)
 {
         struct snd_pcm_runtime *runtime;
 
+        if (PCM_RUNTIME_CHECK(substream))
+                return;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return);
         if (runtime->private_free != NULL)
                 runtime->private_free(runtime);
         snd_free_pages((void*)runtime->status,
@@ -953,7 +955,8 @@ static int snd_pcm_dev_register(struct snd_device *device)
         struct snd_pcm *pcm = device->device_data;
         struct device *dev;
 
-        snd_assert(pcm != NULL && device != NULL, return -ENXIO);
+        if (snd_BUG_ON(!pcm || !device))
+                return -ENXIO;
         mutex_lock(&register_mutex);
         err = snd_pcm_add(pcm);
         if (err) {
@@ -1043,10 +1046,11 @@ int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree)
 {
         struct snd_pcm *pcm;
 
-        snd_assert(notify != NULL &&
-                   notify->n_register != NULL &&
-                   notify->n_unregister != NULL &&
-                   notify->n_disconnect, return -EINVAL);
+        if (snd_BUG_ON(!notify ||
+                       !notify->n_register ||
+                       !notify->n_unregister ||
+                       !notify->n_disconnect))
+                return -EINVAL;
         mutex_lock(&register_mutex);
         if (nfree) {
                 list_del(&notify->list);
diff --git a/sound/core/pcm_compat.c b/sound/core/pcm_compat.c
index 49aa693fba8..36d7a599823 100644
--- a/sound/core/pcm_compat.c
+++ b/sound/core/pcm_compat.c
@@ -397,7 +397,8 @@ static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
         snd_pcm_uframes_t boundary;
         int err;
 
-        snd_assert(runtime, return -EINVAL);
+        if (snd_BUG_ON(!runtime))
+                return -EINVAL;
 
         if (get_user(sflags, &src->flags) ||
             get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index 1533f0379e9..6ea5cfb8399 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -85,7 +85,8 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
                 }
                 frames = runtime->buffer_size - runtime->silence_filled;
         }
-        snd_assert(frames <= runtime->buffer_size, return);
+        if (snd_BUG_ON(frames > runtime->buffer_size))
+                return;
         if (frames == 0)
                 return;
         ofs = runtime->silence_start % runtime->buffer_size;
@@ -96,7 +97,7 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
                         if (substream->ops->silence) {
                                 int err;
                                 err = substream->ops->silence(substream, -1, ofs, transfer);
-                                snd_assert(err >= 0, );
+                                snd_BUG_ON(err < 0);
                         } else {
                                 char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs);
                                 snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels);
@@ -108,7 +109,7 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
                                 for (c = 0; c < channels; ++c) {
                                         int err;
                                         err = substream->ops->silence(substream, c, ofs, transfer);
-                                        snd_assert(err >= 0, );
+                                        snd_BUG_ON(err < 0);
                                 }
                         } else {
                                 size_t dma_csize = runtime->dma_bytes / channels;
@@ -354,7 +355,7 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b,
 {
         u_int64_t n = (u_int64_t) a * b;
         if (c == 0) {
-                snd_assert(n > 0, );
+                snd_BUG_ON(!n);
                 *r = 0;
                 return UINT_MAX;
         }
@@ -380,7 +381,8 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b,
 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v)
 {
         int changed = 0;
-        snd_assert(!snd_interval_empty(i), return -EINVAL);
+        if (snd_BUG_ON(snd_interval_empty(i)))
+                return -EINVAL;
         if (i->min < v->min) {
                 i->min = v->min;
                 i->openmin = v->openmin;
@@ -423,7 +425,8 @@ EXPORT_SYMBOL(snd_interval_refine);
 
 static int snd_interval_refine_first(struct snd_interval *i)
 {
-        snd_assert(!snd_interval_empty(i), return -EINVAL);
+        if (snd_BUG_ON(snd_interval_empty(i)))
+                return -EINVAL;
         if (snd_interval_single(i))
                 return 0;
         i->max = i->min;
@@ -435,7 +438,8 @@ static int snd_interval_refine_first(struct snd_interval *i)
 
 static int snd_interval_refine_last(struct snd_interval *i)
 {
-        snd_assert(!snd_interval_empty(i), return -EINVAL);
+        if (snd_BUG_ON(snd_interval_empty(i)))
+                return -EINVAL;
         if (snd_interval_single(i))
                 return 0;
         i->min = i->max;
@@ -889,7 +893,8 @@ int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond,
         c->private = private;
         k = 0;
         while (1) {
-                snd_assert(k < ARRAY_SIZE(c->deps), return -EINVAL);
+                if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps)))
+                        return -EINVAL;
                 c->deps[k++] = dep;
                 if (dep < 0)
                         break;
@@ -1285,7 +1290,8 @@ int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm,
                 return changed;
         if (params->rmask) {
                 int err = snd_pcm_hw_refine(pcm, params);
-                snd_assert(err >= 0, return err);
+                if (snd_BUG_ON(err < 0))
+                        return err;
         }
         return snd_pcm_hw_param_value(params, var, dir);
 }
@@ -1330,7 +1336,8 @@ int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm,
                 return changed;
         if (params->rmask) {
                 int err = snd_pcm_hw_refine(pcm, params);
-                snd_assert(err >= 0, return err);
+                if (snd_BUG_ON(err < 0))
+                        return err;
         }
         return snd_pcm_hw_param_value(params, var, dir);
 }
@@ -1368,7 +1375,8 @@ int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
                         err = snd_pcm_hw_param_first(pcm, params, *v, NULL);
                 else
                         err = snd_pcm_hw_param_last(pcm, params, *v, NULL);
-                snd_assert(err >= 0, return err);
+                if (snd_BUG_ON(err < 0))
+                        return err;
         }
         return 0;
 }
@@ -1466,9 +1474,9 @@ void snd_pcm_period_elapsed(struct snd_pcm_substream *substream)
         struct snd_pcm_runtime *runtime;
         unsigned long flags;
 
-        snd_assert(substream != NULL, return);
+        if (PCM_RUNTIME_CHECK(substream))
+                return;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return);
 
         if (runtime->transfer_ack_begin)
                 runtime->transfer_ack_begin(substream);
@@ -1567,7 +1575,6 @@ static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream,
                         return err;
         } else {
                 char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff);
-                snd_assert(runtime->dma_area, return -EFAULT);
                 if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames)))
                         return -EFAULT;
         }
@@ -1629,7 +1636,10 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream,
                 cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
                 if (frames > cont)
                         frames = cont;
-                snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL);
+                if (snd_BUG_ON(!frames)) {
+                        snd_pcm_stream_unlock_irq(substream);
+                        return -EINVAL;
+                }
                 appl_ptr = runtime->control->appl_ptr;
                 appl_ofs = appl_ptr % runtime->buffer_size;
                 snd_pcm_stream_unlock_irq(substream);
@@ -1669,18 +1679,30 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream,
         return xfer > 0 ? (snd_pcm_sframes_t)xfer : err;
 }
 
-snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size)
+/* sanity-check for read/write methods */
+static int pcm_sanity_check(struct snd_pcm_substream *substream)
 {
         struct snd_pcm_runtime *runtime;
-        int nonblock;
-
-        snd_assert(substream != NULL, return -ENXIO);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -ENXIO;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return -ENXIO);
-        snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
+        if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area))
+                return -EINVAL;
         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
                 return -EBADFD;
+        return 0;
+}
+
+snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size)
+{
+        struct snd_pcm_runtime *runtime;
+        int nonblock;
+        int err;
 
+        err = pcm_sanity_check(substream);
+        if (err < 0)
+                return err;
+        runtime = substream->runtime;
         nonblock = !!(substream->f_flags & O_NONBLOCK);
 
         if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
@@ -1703,7 +1725,8 @@ static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream,
         int channels = runtime->channels;
         int c;
         if (substream->ops->copy) {
-                snd_assert(substream->ops->silence != NULL, return -EINVAL);
+                if (snd_BUG_ON(!substream->ops->silence))
+                        return -EINVAL;
                 for (c = 0; c < channels; ++c, ++bufs) {
                         if (*bufs == NULL) {
                                 if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0)
@@ -1717,7 +1740,6 @@ static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream,
         } else {
                 /* default transfer behaviour */
                 size_t dma_csize = runtime->dma_bytes / channels;
-                snd_assert(runtime->dma_area, return -EFAULT);
                 for (c = 0; c < channels; ++c, ++bufs) {
                         char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff);
                         if (*bufs == NULL) {
@@ -1738,14 +1760,12 @@ snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
 {
         struct snd_pcm_runtime *runtime;
         int nonblock;
+        int err;
 
-        snd_assert(substream != NULL, return -ENXIO);
+        err = pcm_sanity_check(substream);
+        if (err < 0)
+                return err;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return -ENXIO);
-        snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
-        if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
-                return -EBADFD;
-
         nonblock = !!(substream->f_flags & O_NONBLOCK);
 
         if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
@@ -1769,7 +1789,6 @@ static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream,
                         return err;
         } else {
                 char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff);
-                snd_assert(runtime->dma_area, return -EFAULT);
                 if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames)))
                         return -EFAULT;
         }
@@ -1841,7 +1860,10 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream,
                 cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
                 if (frames > cont)
                         frames = cont;
-                snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL);
+                if (snd_BUG_ON(!frames)) {
+                        snd_pcm_stream_unlock_irq(substream);
+                        return -EINVAL;
+                }
                 appl_ptr = runtime->control->appl_ptr;
                 appl_ofs = appl_ptr % runtime->buffer_size;
                 snd_pcm_stream_unlock_irq(substream);
@@ -1879,14 +1901,12 @@ snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __u
 {
         struct snd_pcm_runtime *runtime;
         int nonblock;
+        int err;
         
-        snd_assert(substream != NULL, return -ENXIO);
+        err = pcm_sanity_check(substream);
+        if (err < 0)
+                return err;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return -ENXIO);
-        snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
-        if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
-                return -EBADFD;
-
         nonblock = !!(substream->f_flags & O_NONBLOCK);
         if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED)
                 return -EINVAL;
@@ -1916,7 +1936,6 @@ static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream,
                 }
         } else {
                 snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels;
-                snd_assert(runtime->dma_area, return -EFAULT);
                 for (c = 0; c < channels; ++c, ++bufs) {
                         char *hwbuf;
                         char __user *buf;
@@ -1938,11 +1957,12 @@ snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
 {
         struct snd_pcm_runtime *runtime;
         int nonblock;
+        int err;
 
-        snd_assert(substream != NULL, return -ENXIO);
+        err = pcm_sanity_check(substream);
+        if (err < 0)
+                return err;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return -ENXIO);
-        snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
                 return -EBADFD;
 
diff --git a/sound/core/pcm_memory.c b/sound/core/pcm_memory.c
index ff07b4a9992..859b1185e69 100644
--- a/sound/core/pcm_memory.c
+++ b/sound/core/pcm_memory.c
@@ -50,8 +50,6 @@ static int preallocate_pcm_pages(struct snd_pcm_substream *substream, size_t siz
         struct snd_dma_buffer *dmab = &substream->dma_buffer;
         int err;
 
-        snd_assert(size > 0, return -EINVAL);
-
         /* already reserved? */
         if (snd_dma_get_reserved_buf(dmab, substream->dma_buf_id) > 0) {
                 if (dmab->bytes >= size)
@@ -342,10 +340,12 @@ int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size)
         struct snd_pcm_runtime *runtime;
         struct snd_dma_buffer *dmab = NULL;
 
-        snd_assert(substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_UNKNOWN, return -EINVAL);
-        snd_assert(substream != NULL, return -EINVAL);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -EINVAL;
+        if (snd_BUG_ON(substream->dma_buffer.dev.type ==
+                       SNDRV_DMA_TYPE_UNKNOWN))
+                return -EINVAL;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return -EINVAL);
 
         if (runtime->dma_buffer_p) {
                 /* perphaps, we might free the large DMA memory region
@@ -391,9 +391,9 @@ int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream)
 {
         struct snd_pcm_runtime *runtime;
 
-        snd_assert(substream != NULL, return -EINVAL);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -EINVAL;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return -EINVAL);
         if (runtime->dma_area == NULL)
                 return 0;
         if (runtime->dma_buffer_p != &substream->dma_buffer) {
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index c487025d345..df2299a8cef 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -95,7 +95,6 @@ int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
         struct snd_pcm *pcm = substream->pcm;
         struct snd_pcm_str *pstr = substream->pstr;
 
-        snd_assert(substream != NULL, return -ENXIO);
         memset(info, 0, sizeof(*info));
         info->card = pcm->card->number;
         info->device = pcm->device;
@@ -370,9 +369,9 @@ static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
         unsigned int bits;
         snd_pcm_uframes_t frames;
 
-        snd_assert(substream != NULL, return -ENXIO);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -ENXIO;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return -ENXIO);
         snd_pcm_stream_lock_irq(substream);
         switch (runtime->status->state) {
         case SNDRV_PCM_STATE_OPEN:
@@ -490,9 +489,9 @@ static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
         struct snd_pcm_runtime *runtime;
         int result = 0;
 
-        snd_assert(substream != NULL, return -ENXIO);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -ENXIO;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return -ENXIO);
         snd_pcm_stream_lock_irq(substream);
         switch (runtime->status->state) {
         case SNDRV_PCM_STATE_SETUP:
@@ -518,9 +517,9 @@ static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 {
         struct snd_pcm_runtime *runtime;
 
-        snd_assert(substream != NULL, return -ENXIO);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -ENXIO;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return -ENXIO);
         snd_pcm_stream_lock_irq(substream);
         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
                 snd_pcm_stream_unlock_irq(substream);
@@ -622,11 +621,8 @@ static int snd_pcm_status_user(struct snd_pcm_substream *substream,
                                struct snd_pcm_status __user * _status)
 {
         struct snd_pcm_status status;
-        struct snd_pcm_runtime *runtime;
         int res;
         
-        snd_assert(substream != NULL, return -ENXIO);
-        runtime = substream->runtime;
         memset(&status, 0, sizeof(status));
         res = snd_pcm_status(substream, &status);
         if (res < 0)
@@ -642,7 +638,6 @@ static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
         struct snd_pcm_runtime *runtime;
         unsigned int channel;
         
-        snd_assert(substream != NULL, return -ENXIO);
         channel = info->channel;
         runtime = substream->runtime;
         snd_pcm_stream_lock_irq(substream);
@@ -1250,7 +1245,6 @@ static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
         if (err < 0)
                 return err;
-        // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
         runtime->hw_ptr_base = 0;
         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
                 runtime->status->hw_ptr % runtime->period_size;
@@ -1421,7 +1415,6 @@ static int snd_pcm_drain(struct snd_pcm_substream *substream)
         int i, num_drecs;
         struct drain_rec *drec, drec_tmp, *d;
 
-        snd_assert(substream != NULL, return -ENXIO);
         card = substream->pcm->card;
         runtime = substream->runtime;
 
@@ -1541,7 +1534,8 @@ static int snd_pcm_drop(struct snd_pcm_substream *substream)
         struct snd_card *card;
         int result = 0;
         
-        snd_assert(substream != NULL, return -ENXIO);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -ENXIO;
         runtime = substream->runtime;
         card = substream->pcm->card;
 
@@ -1934,33 +1928,41 @@ int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
         }
         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
-        snd_assert(err >= 0, return -EINVAL);
+        if (err < 0)
+                return err;
 
         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
-        snd_assert(err >= 0, return -EINVAL);
+        if (err < 0)
+                return err;
 
         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
-        snd_assert(err >= 0, return -EINVAL);
+        if (err < 0)
+                return err;
 
         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
                                            hw->channels_min, hw->channels_max);
-        snd_assert(err >= 0, return -EINVAL);
+        if (err < 0)
+                return err;
 
         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
                                            hw->rate_min, hw->rate_max);
-        snd_assert(err >= 0, return -EINVAL);
+         if (err < 0)
+                 return err;
 
         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
                                            hw->period_bytes_min, hw->period_bytes_max);
-        snd_assert(err >= 0, return -EINVAL);
+         if (err < 0)
+                 return err;
 
         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
                                            hw->periods_min, hw->periods_max);
-        snd_assert(err >= 0, return -EINVAL);
+        if (err < 0)
+                return err;
 
         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
                                            hw->period_bytes_min, hw->buffer_bytes_max);
-        snd_assert(err >= 0, return -EINVAL);
+        if (err < 0)
+                return err;
 
         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
@@ -1971,7 +1973,8 @@ int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
         /* FIXME: remove */
         if (runtime->dma_bytes) {
                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
-                snd_assert(err >= 0, return -EINVAL);
+                if (err < 0)
+                        return -EINVAL;
         }
 
         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
@@ -2067,8 +2070,8 @@ static int snd_pcm_open_file(struct file *file,
         struct snd_pcm_str *str;
         int err;
 
-        snd_assert(rpcm_file != NULL, return -EINVAL);
-        *rpcm_file = NULL;
+        if (rpcm_file)
+                *rpcm_file = NULL;
 
         err = snd_pcm_open_substream(pcm, stream, file, &substream);
         if (err < 0)
@@ -2086,7 +2089,8 @@ static int snd_pcm_open_file(struct file *file,
                 substream->pcm_release = pcm_release_private;
         }
         file->private_data = pcm_file;
-        *rpcm_file = pcm_file;
+        if (rpcm_file)
+                *rpcm_file = pcm_file;
         return 0;
 }
 
@@ -2170,7 +2174,8 @@ static int snd_pcm_release(struct inode *inode, struct file *file)
 
         pcm_file = file->private_data;
         substream = pcm_file->substream;
-        snd_assert(substream != NULL, return -ENXIO);
+        if (snd_BUG_ON(!substream))
+                return -ENXIO;
         pcm = substream->pcm;
         fasync_helper(-1, file, 0, &substream->runtime->fasync);
         mutex_lock(&pcm->open_mutex);
@@ -2493,8 +2498,6 @@ static int snd_pcm_common_ioctl1(struct file *file,
                                  struct snd_pcm_substream *substream,
                                  unsigned int cmd, void __user *arg)
 {
-        snd_assert(substream != NULL, return -ENXIO);
-
         switch (cmd) {
         case SNDRV_PCM_IOCTL_PVERSION:
                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
@@ -2563,8 +2566,10 @@ static int snd_pcm_playback_ioctl1(struct file *file,
                                    struct snd_pcm_substream *substream,
                                    unsigned int cmd, void __user *arg)
 {
-        snd_assert(substream != NULL, return -ENXIO);
-        snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
+        if (snd_BUG_ON(!substream))
+                return -ENXIO;
+        if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
+                return -EINVAL;
         switch (cmd) {
         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
         {
@@ -2643,8 +2648,10 @@ static int snd_pcm_capture_ioctl1(struct file *file,
                                   struct snd_pcm_substream *substream,
                                   unsigned int cmd, void __user *arg)
 {
-        snd_assert(substream != NULL, return -ENXIO);
-        snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
+        if (snd_BUG_ON(!substream))
+                return -ENXIO;
+        if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
+                return -EINVAL;
         switch (cmd) {
         case SNDRV_PCM_IOCTL_READI_FRAMES:
         {
@@ -2783,7 +2790,8 @@ static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
 
         pcm_file = file->private_data;
         substream = pcm_file->substream;
-        snd_assert(substream != NULL, return -ENXIO);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -ENXIO;
         runtime = substream->runtime;
         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
                 return -EBADFD;
@@ -2806,21 +2814,17 @@ static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
 
         pcm_file = file->private_data;
         substream = pcm_file->substream;
-        snd_assert(substream != NULL, result = -ENXIO; goto end);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -ENXIO;
         runtime = substream->runtime;
-        if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
-                result = -EBADFD;
-                goto end;
-        }
-        if (!frame_aligned(runtime, count)) {
-                result = -EINVAL;
-                goto end;
-        }
+        if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
+                return -EBADFD;
+        if (!frame_aligned(runtime, count))
+                return -EINVAL;
         count = bytes_to_frames(runtime, count);
         result = snd_pcm_lib_write(substream, buf, count);
         if (result > 0)
                 result = frames_to_bytes(runtime, result);
- end:
         return result;
 }
 
@@ -2838,7 +2842,8 @@ static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
 
         pcm_file = iocb->ki_filp->private_data;
         substream = pcm_file->substream;
-        snd_assert(substream != NULL, return -ENXIO);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -ENXIO;
         runtime = substream->runtime;
         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
                 return -EBADFD;
@@ -2872,17 +2877,14 @@ static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
 
         pcm_file = iocb->ki_filp->private_data;
         substream = pcm_file->substream;
-        snd_assert(substream != NULL, result = -ENXIO; goto end);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -ENXIO;
         runtime = substream->runtime;
-        if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
-                result = -EBADFD;
-                goto end;
-        }
+        if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
+                return -EBADFD;
         if (nr_segs > 128 || nr_segs != runtime->channels ||
-            !frame_aligned(runtime, iov->iov_len)) {
-                result = -EINVAL;
-                goto end;
-        }
+            !frame_aligned(runtime, iov->iov_len))
+                return -EINVAL;
         frames = bytes_to_samples(runtime, iov->iov_len);
         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
         if (bufs == NULL)
@@ -2893,7 +2895,6 @@ static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
         if (result > 0)
                 result = frames_to_bytes(runtime, result);
         kfree(bufs);
- end:
         return result;
 }
 
@@ -2908,7 +2909,8 @@ static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
         pcm_file = file->private_data;
 
         substream = pcm_file->substream;
-        snd_assert(substream != NULL, return -ENXIO);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -ENXIO;
         runtime = substream->runtime;
 
         poll_wait(file, &runtime->sleep, wait);
@@ -2946,7 +2948,8 @@ static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
         pcm_file = file->private_data;
 
         substream = pcm_file->substream;
-        snd_assert(substream != NULL, return -ENXIO);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -ENXIO;
         runtime = substream->runtime;
 
         poll_wait(file, &runtime->sleep, wait);
@@ -3016,7 +3019,6 @@ static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file
         if (!(area->vm_flags & VM_READ))
                 return -EINVAL;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return -EAGAIN);
         size = area->vm_end - area->vm_start;
         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
                 return -EINVAL;
@@ -3056,7 +3058,6 @@ static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file
         if (!(area->vm_flags & VM_READ))
                 return -EINVAL;
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return -EAGAIN);
         size = area->vm_end - area->vm_start;
         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
                 return -EINVAL;
@@ -3188,7 +3189,6 @@ int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
                         return -EINVAL;
         }
         runtime = substream->runtime;
-        snd_assert(runtime != NULL, return -EAGAIN);
         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
                 return -EBADFD;
         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
@@ -3220,7 +3220,8 @@ static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
         
         pcm_file = file->private_data;
         substream = pcm_file->substream;
-        snd_assert(substream != NULL, return -ENXIO);
+        if (PCM_RUNTIME_CHECK(substream))
+                return -ENXIO;
 
         offset = area->vm_pgoff << PAGE_SHIFT;
         switch (offset) {
@@ -3248,9 +3249,9 @@ static int snd_pcm_fasync(int fd, struct file * file, int on)
         lock_kernel();
         pcm_file = file->private_data;
         substream = pcm_file->substream;
-        snd_assert(substream != NULL, goto out);
+        if (PCM_RUNTIME_CHECK(substream))
+                goto out;
         runtime = substream->runtime;
-
         err = fasync_helper(fd, file, on, &runtime->fasync);
 out:
         unlock_kernel();
diff --git a/sound/core/pcm_timer.c b/sound/core/pcm_timer.c
index 033a024d153..2c89c04f291 100644
--- a/sound/core/pcm_timer.c
+++ b/sound/core/pcm_timer.c
@@ -51,12 +51,14 @@ void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream)
         
         mult = 1000000000;
         rate = runtime->rate;
-        snd_assert(rate != 0, return);
+        if (snd_BUG_ON(!rate))
+                return;
         l = gcd(mult, rate);
         mult /= l;
         rate /= l;
         fsize = runtime->period_size;
-        snd_assert(fsize != 0, return);
+        if (snd_BUG_ON(!fsize))
+                return;
         l = gcd(rate, fsize);
         rate /= l;
         fsize /= l;
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index b917a9f981c..c4995c9f573 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -470,8 +470,8 @@ int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile)
         struct snd_rawmidi_substream *substream;
         struct snd_rawmidi_runtime *runtime;
 
-        snd_assert(rfile != NULL, return -ENXIO);
-        snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO);
+        if (snd_BUG_ON(!rfile))
+                return -ENXIO;
         rmidi = rfile->rmidi;
         mutex_lock(&rmidi->open_mutex);
         if (rfile->input != NULL) {
@@ -1100,7 +1100,7 @@ int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
                 return -EINVAL;
         }
         spin_lock_irqsave(&runtime->lock, flags);
-        snd_assert(runtime->avail + count <= runtime->buffer_size, );
+        snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
         runtime->hw_ptr += count;
         runtime->hw_ptr %= runtime->buffer_size;
         runtime->avail += count;
@@ -1141,8 +1141,10 @@ static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
         long count1, result;
         struct snd_rawmidi_runtime *runtime = substream->runtime;
 
-        snd_assert(kernelbuf != NULL || userbuf != NULL, return -EINVAL);
-        snd_assert(runtime->buffer != NULL, return -EINVAL);
+        if (snd_BUG_ON(!kernelbuf && !userbuf))
+                return -EINVAL;
+        if (snd_BUG_ON(!runtime->buffer))
+                return -EINVAL;
 
         result = 0;
         spin_lock_irqsave(&runtime->lock, flags);
@@ -1420,9 +1422,10 @@ int snd_rawmidi_new(struct snd_card *card, char *id, int device,
                 .dev_disconnect = snd_rawmidi_dev_disconnect,
         };
 
-        snd_assert(rrawmidi != NULL, return -EINVAL);
-        *rrawmidi = NULL;
-        snd_assert(card != NULL, return -ENXIO);
+        if (snd_BUG_ON(!card))
+                return -ENXIO;
+        if (rrawmidi)
+                *rrawmidi = NULL;
         rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
         if (rmidi == NULL) {
                 snd_printk(KERN_ERR "rawmidi: cannot allocate\n");
@@ -1455,7 +1458,8 @@ int snd_rawmidi_new(struct snd_card *card, char *id, int device,
                 snd_rawmidi_free(rmidi);
                 return err;
         }
-        *rrawmidi = rmidi;
+        if (rrawmidi)
+                *rrawmidi = rmidi;
         return 0;
 }
 
@@ -1472,7 +1476,8 @@ static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
 
 static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
 {
-        snd_assert(rmidi != NULL, return -ENXIO);       
+        if (!rmidi)
+                return 0;
 
         snd_info_free_entry(rmidi->proc_entry);
         rmidi->proc_entry = NULL;
diff --git a/sound/core/rtctimer.c b/sound/core/rtctimer.c
index 97b30fb4c36..51e64e30dd3 100644
--- a/sound/core/rtctimer.c
+++ b/sound/core/rtctimer.c
@@ -91,7 +91,8 @@ static int
 rtctimer_start(struct snd_timer *timer)
 {
         rtc_task_t *rtc = timer->private_data;
-        snd_assert(rtc != NULL, return -EINVAL);
+        if (snd_BUG_ON(!rtc))
+                return -EINVAL;
         rtc_control(rtc, RTC_IRQP_SET, rtctimer_freq);
         rtc_control(rtc, RTC_PIE_ON, 0);
         return 0;
@@ -101,7 +102,8 @@ static int
 rtctimer_stop(struct snd_timer *timer)
 {
         rtc_task_t *rtc = timer->private_data;
-        snd_assert(rtc != NULL, return -EINVAL);
+        if (snd_BUG_ON(!rtc))
+                return -EINVAL;
         rtc_control(rtc, RTC_PIE_OFF, 0);
         return 0;
 }
diff --git a/sound/core/seq/oss/seq_oss.c b/sound/core/seq/oss/seq_oss.c
index 777796e9449..f25e3cc7ddf 100644
--- a/sound/core/seq/oss/seq_oss.c
+++ b/sound/core/seq/oss/seq_oss.c
@@ -164,7 +164,8 @@ odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
 {
         struct seq_oss_devinfo *dp;
         dp = file->private_data;
-        snd_assert(dp != NULL, return -EIO);
+        if (snd_BUG_ON(!dp))
+                return -ENXIO;
         return snd_seq_oss_read(dp, buf, count);
 }
 
@@ -174,7 +175,8 @@ odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offs
 {
         struct seq_oss_devinfo *dp;
         dp = file->private_data;
-        snd_assert(dp != NULL, return -EIO);
+        if (snd_BUG_ON(!dp))
+                return -ENXIO;
         return snd_seq_oss_write(dp, buf, count, file);
 }
 
@@ -183,7 +185,8 @@ odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
         struct seq_oss_devinfo *dp;
         dp = file->private_data;
-        snd_assert(dp != NULL, return -EIO);
+        if (snd_BUG_ON(!dp))
+                return -ENXIO;
         return snd_seq_oss_ioctl(dp, cmd, arg);
 }
 
@@ -198,7 +201,8 @@ odev_poll(struct file *file, poll_table * wait)
 {
         struct seq_oss_devinfo *dp;
         dp = file->private_data;
-        snd_assert(dp != NULL, return 0);
+        if (snd_BUG_ON(!dp))
+                return -ENXIO;
         return snd_seq_oss_poll(dp, file, wait);
 }
 
diff --git a/sound/core/seq/oss/seq_oss_synth.c b/sound/core/seq/oss/seq_oss_synth.c
index e024e4588b8..945a27c34a9 100644
--- a/sound/core/seq/oss/seq_oss_synth.c
+++ b/sound/core/seq/oss/seq_oss_synth.c
@@ -308,7 +308,8 @@ snd_seq_oss_synth_cleanup(struct seq_oss_devinfo *dp)
         struct seq_oss_synth *rec;
         struct seq_oss_synthinfo *info;
 
-        snd_assert(dp->max_synthdev <= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS, return);
+        if (snd_BUG_ON(dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS))
+                return;
         for (i = 0; i < dp->max_synthdev; i++) {
                 info = &dp->synths[i];
                 if (! info->opened)
@@ -402,7 +403,8 @@ snd_seq_oss_synth_reset(struct seq_oss_devinfo *dp, int dev)
         struct seq_oss_synth *rec;
         struct seq_oss_synthinfo *info;
 
-        snd_assert(dev >= 0 && dev < dp->max_synthdev, return);
+        if (snd_BUG_ON(dev < 0 || dev >= dp->max_synthdev))
+                return;
         info = &dp->synths[dev];
         if (! info->opened)
                 return;
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index 7a1545d2d95..8ca2be339f3 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -266,7 +266,8 @@ static int seq_free_client1(struct snd_seq_client *client)
 {
         unsigned long flags;
 
-        snd_assert(client != NULL, return -EINVAL);
+        if (!client)
+                return 0;
         snd_seq_delete_all_ports(client);
         snd_seq_queue_client_leave(client->number);
         spin_lock_irqsave(&clients_lock, flags);
@@ -403,7 +404,8 @@ static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count,
                 return -EFAULT;
 
         /* check client structures are in place */
-        snd_assert(client != NULL, return -ENXIO);
+        if (snd_BUG_ON(!client))
+                return -ENXIO;
 
         if (!client->accept_input || (fifo = client->data.user.fifo) == NULL)
                 return -ENXIO;
@@ -825,7 +827,8 @@ int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop)
         struct snd_seq_client *client;
         int result;
 
-        snd_assert(cell != NULL, return -EINVAL);
+        if (snd_BUG_ON(!cell))
+                return -EINVAL;
 
         client = snd_seq_client_use_ptr(cell->event.source.client);
         if (client == NULL) {
@@ -994,7 +997,8 @@ static ssize_t snd_seq_write(struct file *file, const char __user *buf,
                 return -ENXIO;
 
         /* check client structures are in place */
-        snd_assert(client != NULL, return -ENXIO);
+        if (snd_BUG_ON(!client))
+                return -ENXIO;
                 
         if (!client->accept_output || client->pool == NULL)
                 return -ENXIO;
@@ -1076,7 +1080,8 @@ static unsigned int snd_seq_poll(struct file *file, poll_table * wait)
         unsigned int mask = 0;
 
         /* check client structures are in place */
-        snd_assert(client != NULL, return -ENXIO);
+        if (snd_BUG_ON(!client))
+                return -ENXIO;
 
         if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) &&
             client->data.user.fifo) {
@@ -2195,7 +2200,8 @@ static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg
 {
         struct snd_seq_client *client = file->private_data;
 
-        snd_assert(client != NULL, return -ENXIO);
+        if (snd_BUG_ON(!client))
+                return -ENXIO;
                 
         return snd_seq_do_ioctl(client, cmd, (void __user *) arg);
 }
@@ -2216,7 +2222,8 @@ int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
         struct snd_seq_client *client;
         va_list args;
 
-        snd_assert(! in_interrupt(), return -EBUSY);
+        if (snd_BUG_ON(in_interrupt()))
+                return -EBUSY;
 
         if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD)
                 return -EINVAL;
@@ -2265,7 +2272,8 @@ int snd_seq_delete_kernel_client(int client)
 {
         struct snd_seq_client *ptr;
 
-        snd_assert(! in_interrupt(), return -EBUSY);
+        if (snd_BUG_ON(in_interrupt()))
+                return -EBUSY;
 
         ptr = clientptr(client);
         if (ptr == NULL)
@@ -2288,7 +2296,8 @@ static int kernel_client_enqueue(int client, struct snd_seq_event *ev,
         struct snd_seq_client *cptr;
         int result;
 
-        snd_assert(ev != NULL, return -EINVAL);
+        if (snd_BUG_ON(!ev))
+                return -EINVAL;
 
         if (ev->type == SNDRV_SEQ_EVENT_NONE)
                 return 0; /* ignore this */
@@ -2354,7 +2363,8 @@ int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev,
         struct snd_seq_client *cptr;
         int result;
 
-        snd_assert(ev != NULL, return -EINVAL);
+        if (snd_BUG_ON(!ev))
+                return -EINVAL;
 
         /* fill in client number */
         ev->queue = SNDRV_SEQ_QUEUE_DIRECT;
diff --git a/sound/core/seq/seq_compat.c b/sound/core/seq/seq_compat.c
index 9628c06e4ea..38693f47c26 100644
--- a/sound/core/seq/seq_compat.c
+++ b/sound/core/seq/seq_compat.c
@@ -92,7 +92,8 @@ static long snd_seq_ioctl_compat(struct file *file, unsigned int cmd, unsigned l
         struct snd_seq_client *client = file->private_data;
         void __user *argp = compat_ptr(arg);
 
-        snd_assert(client != NULL, return -ENXIO);
+        if (snd_BUG_ON(!client))
+                return -ENXIO;
 
         switch (cmd) {
         case SNDRV_SEQ_IOCTL_PVERSION:
diff --git a/sound/core/seq/seq_device.c b/sound/core/seq/seq_device.c
index 05410e536a4..1f997675c89 100644
--- a/sound/core/seq/seq_device.c
+++ b/sound/core/seq/seq_device.c
@@ -187,7 +187,8 @@ int snd_seq_device_new(struct snd_card *card, int device, char *id, int argsize,
         if (result)
                 *result = NULL;
 
-        snd_assert(id != NULL, return -EINVAL);
+        if (snd_BUG_ON(!id))
+                return -EINVAL;
 
         ops = find_driver(id, 1);
         if (ops == NULL)
@@ -232,7 +233,8 @@ static int snd_seq_device_free(struct snd_seq_device *dev)
 {
         struct ops_list *ops;
 
-        snd_assert(dev != NULL, return -EINVAL);
+        if (snd_BUG_ON(!dev))
+                return -EINVAL;
 
         ops = find_driver(dev->id, 0);
         if (ops == NULL)
diff --git a/sound/core/seq/seq_fifo.c b/sound/core/seq/seq_fifo.c
index 3a94ed021bd..0d75afa786b 100644
--- a/sound/core/seq/seq_fifo.c
+++ b/sound/core/seq/seq_fifo.c
@@ -65,9 +65,11 @@ void snd_seq_fifo_delete(struct snd_seq_fifo **fifo)
 {
         struct snd_seq_fifo *f;
 
-        snd_assert(fifo != NULL, return);
+        if (snd_BUG_ON(!fifo))
+                return;
         f = *fifo;
-        snd_assert(f != NULL, return);
+        if (snd_BUG_ON(!f))
+                return;
         *fifo = NULL;
 
         snd_seq_fifo_clear(f);
@@ -116,7 +118,8 @@ int snd_seq_fifo_event_in(struct snd_seq_fifo *f,
         unsigned long flags;
         int err;
 
-        snd_assert(f != NULL, return -EINVAL);
+        if (snd_BUG_ON(!f))
+                return -EINVAL;
 
         snd_use_lock_use(&f->use_lock);
         err = snd_seq_event_dup(f->pool, event, &cell, 1, NULL); /* always non-blocking */
@@ -174,7 +177,8 @@ int snd_seq_fifo_cell_out(struct snd_seq_fifo *f,
         unsigned long flags;
         wait_queue_t wait;
 
-        snd_assert(f != NULL, return -EINVAL);
+        if (snd_BUG_ON(!f))
+                return -EINVAL;
 
         *cellp = NULL;
         init_waitqueue_entry(&wait, current);
@@ -233,7 +237,8 @@ int snd_seq_fifo_resize(struct snd_seq_fifo *f, int poolsize)
         struct snd_seq_pool *newpool, *oldpool;
         struct snd_seq_event_cell *cell, *next, *oldhead;
 
-        snd_assert(f != NULL && f->pool != NULL, return -EINVAL);
+        if (snd_BUG_ON(!f || !f->pool))
+                return -EINVAL;
 
         /* allocate new pool */
         newpool = snd_seq_pool_new(poolsize);
diff --git a/sound/core/seq/seq_memory.c b/sound/core/seq/seq_memory.c
index 0cf6ac47731..7fb55436287 100644
--- a/sound/core/seq/seq_memory.c
+++ b/sound/core/seq/seq_memory.c
@@ -187,9 +187,11 @@ void snd_seq_cell_free(struct snd_seq_event_cell * cell)
         unsigned long flags;
         struct snd_seq_pool *pool;
 
-        snd_assert(cell != NULL, return);
+        if (snd_BUG_ON(!cell))
+                return;
         pool = cell->pool;
-        snd_assert(pool != NULL, return);
+        if (snd_BUG_ON(!pool))
+                return;
 
         spin_lock_irqsave(&pool->lock, flags);
         free_cell(pool, cell);
@@ -378,7 +380,8 @@ int snd_seq_pool_init(struct snd_seq_pool *pool)
         struct snd_seq_event_cell *cellptr;
         unsigned long flags;
 
-        snd_assert(pool != NULL, return -EINVAL);
+        if (snd_BUG_ON(!pool))
+                return -EINVAL;
         if (pool->ptr)                  /* should be atomic? */
                 return 0;
 
@@ -414,7 +417,8 @@ int snd_seq_pool_done(struct snd_seq_pool *pool)
         struct snd_seq_event_cell *ptr;
         int max_count = 5 * HZ;
 
-        snd_assert(pool != NULL, return -EINVAL);
+        if (snd_BUG_ON(!pool))
+                return -EINVAL;
 
         /* wait for closing all threads */
         spin_lock_irqsave(&pool->lock, flags);
diff --git a/sound/core/seq/seq_midi.c b/sound/core/seq/seq_midi.c
index 99b35360c50..4d26146a62c 100644
--- a/sound/core/seq/seq_midi.c
+++ b/sound/core/seq/seq_midi.c
@@ -116,7 +116,8 @@ static int dump_midi(struct snd_rawmidi_substream *substream, const char *buf, i
         struct snd_rawmidi_runtime *runtime;
         int tmp;
 
-        snd_assert(substream != NULL || buf != NULL, return -EINVAL);
+        if (snd_BUG_ON(!substream || !buf))
+                return -EINVAL;
         runtime = substream->runtime;
         if ((tmp = runtime->avail) < count) {
                 snd_printd("warning, output event was lost (count = %i, available = %i)\n", count, tmp);
@@ -135,7 +136,8 @@ static int event_process_midi(struct snd_seq_event *ev, int direct,
         struct snd_rawmidi_substream *substream;
         int len;
 
-        snd_assert(msynth != NULL, return -EINVAL);
+        if (snd_BUG_ON(!msynth))
+                return -EINVAL;
         substream = msynth->output_rfile.output;
         if (substream == NULL)
                 return -ENODEV;
@@ -210,7 +212,8 @@ static int midisynth_unsubscribe(void *private_data, struct snd_seq_port_subscri
         int err;
         struct seq_midisynth *msynth = private_data;
 
-        snd_assert(msynth->input_rfile.input != NULL, return -EINVAL);
+        if (snd_BUG_ON(!msynth->input_rfile.input))
+                return -EINVAL;
         err = snd_rawmidi_kernel_release(&msynth->input_rfile);
         return err;
 }
@@ -247,7 +250,8 @@ static int midisynth_unuse(void *private_data, struct snd_seq_port_subscribe *in
         struct seq_midisynth *msynth = private_data;
         unsigned char buf = 0xff; /* MIDI reset */
 
-        snd_assert(msynth->output_rfile.output != NULL, return -EINVAL);
+        if (snd_BUG_ON(!msynth->output_rfile.output))
+                return -EINVAL;
         /* sending single MIDI reset message to shut the device up */
         snd_rawmidi_kernel_write(msynth->output_rfile.output, &buf, 1);
         snd_rawmidi_drain_output(msynth->output_rfile.output);
@@ -285,7 +289,8 @@ snd_seq_midisynth_register_port(struct snd_seq_device *dev)
         int device = dev->device;
         unsigned int input_count = 0, output_count = 0;
 
-        snd_assert(card != NULL && device >= 0 && device < SNDRV_RAWMIDI_DEVICES, return -EINVAL);
+        if (snd_BUG_ON(!card || device < 0 || device >= SNDRV_RAWMIDI_DEVICES))
+                return -EINVAL;
         info = kmalloc(sizeof(*info), GFP_KERNEL);
         if (! info)
                 return -ENOMEM;
diff --git a/sound/core/seq/seq_ports.c b/sound/core/seq/seq_ports.c
index 1c32a53d6bd..3bf7d73ac52 100644
--- a/sound/core/seq/seq_ports.c
+++ b/sound/core/seq/seq_ports.c
@@ -130,7 +130,8 @@ struct snd_seq_client_port *snd_seq_create_port(struct snd_seq_client *client,
         int num = -1;
         
         /* sanity check */
-        snd_assert(client, return NULL);
+        if (snd_BUG_ON(!client))
+                return NULL;
 
         if (client->num_ports >= SNDRV_SEQ_MAX_PORTS - 1) {
                 snd_printk(KERN_WARNING "too many ports for client %d\n", client->number);
@@ -268,8 +269,8 @@ static int port_delete(struct snd_seq_client *client,
         if (port->private_free)
                 port->private_free(port->private_data);
 
-        snd_assert(port->c_src.count == 0,);
-        snd_assert(port->c_dest.count == 0,);
+        snd_BUG_ON(port->c_src.count != 0);
+        snd_BUG_ON(port->c_dest.count != 0);
 
         kfree(port);
         return 0;
@@ -336,7 +337,8 @@ int snd_seq_delete_all_ports(struct snd_seq_client *client)
 int snd_seq_set_port_info(struct snd_seq_client_port * port,
                           struct snd_seq_port_info * info)
 {
-        snd_assert(port && info, return -EINVAL);
+        if (snd_BUG_ON(!port || !info))
+                return -EINVAL;
 
         /* set port name */
         if (info->name[0])
@@ -365,7 +367,8 @@ int snd_seq_set_port_info(struct snd_seq_client_port * port,
 int snd_seq_get_port_info(struct snd_seq_client_port * port,
                           struct snd_seq_port_info * info)
 {
-        snd_assert(port && info, return -EINVAL);
+        if (snd_BUG_ON(!port || !info))
+                return -EINVAL;
 
         /* get port name */
         strlcpy(info->name, port->name, sizeof(info->name));
diff --git a/sound/core/seq/seq_prioq.c b/sound/core/seq/seq_prioq.c
index 85969db576c..0101a8b99b7 100644
--- a/sound/core/seq/seq_prioq.c
+++ b/sound/core/seq/seq_prioq.c
@@ -153,8 +153,8 @@ int snd_seq_prioq_cell_in(struct snd_seq_prioq * f,
         int count;
         int prior;
 
-        snd_assert(f, return -EINVAL);
-        snd_assert(cell, return -EINVAL);
+        if (snd_BUG_ON(!f || !cell))
+                return -EINVAL;
         
         /* check flags */
         prior = (cell->event.flags & SNDRV_SEQ_PRIORITY_MASK);
diff --git a/sound/core/seq/seq_queue.c b/sound/core/seq/seq_queue.c
index 4a48c6ee8ee..e7a8e9e4edb 100644
--- a/sound/core/seq/seq_queue.c
+++ b/sound/core/seq/seq_queue.c
@@ -315,7 +315,8 @@ int snd_seq_enqueue_event(struct snd_seq_event_cell *cell, int atomic, int hop)
         int dest, err;
         struct snd_seq_queue *q;
 
-        snd_assert(cell != NULL, return -EINVAL);
+        if (snd_BUG_ON(!cell))
+                return -EINVAL;
         dest = cell->event.queue;       /* destination queue */
         q = queueptr(dest);
         if (q == NULL)
@@ -734,7 +735,8 @@ int snd_seq_control_queue(struct snd_seq_event *ev, int atomic, int hop)
 {
         struct snd_seq_queue *q;
 
-        snd_assert(ev != NULL, return -EINVAL);
+        if (snd_BUG_ON(!ev))
+                return -EINVAL;
         q = queueptr(ev->data.queue.queue);
 
         if (q == NULL)
diff --git a/sound/core/seq/seq_timer.c b/sound/core/seq/seq_timer.c
index d8fcd62e400..f745c317d6a 100644
--- a/sound/core/seq/seq_timer.c
+++ b/sound/core/seq/seq_timer.c
@@ -173,7 +173,8 @@ int snd_seq_timer_set_tempo(struct snd_seq_timer * tmr, int tempo)
 {
         unsigned long flags;
 
-        snd_assert(tmr, return -EINVAL);
+        if (snd_BUG_ON(!tmr))
+                return -EINVAL;
         if (tempo <= 0)
                 return -EINVAL;
         spin_lock_irqsave(&tmr->lock, flags);
@@ -190,7 +191,8 @@ int snd_seq_timer_set_ppq(struct snd_seq_timer * tmr, int ppq)
 {
         unsigned long flags;
 
-        snd_assert(tmr, return -EINVAL);
+        if (snd_BUG_ON(!tmr))
+                return -EINVAL;
         if (ppq <= 0)
                 return -EINVAL;
         spin_lock_irqsave(&tmr->lock, flags);
@@ -214,7 +216,8 @@ int snd_seq_timer_set_position_tick(struct snd_seq_timer *tmr,
 {
         unsigned long flags;
 
-        snd_assert(tmr, return -EINVAL);
+        if (snd_BUG_ON(!tmr))
+                return -EINVAL;
 
         spin_lock_irqsave(&tmr->lock, flags);
         tmr->tick.cur_tick = position;
@@ -229,7 +232,8 @@ int snd_seq_timer_set_position_time(struct snd_seq_timer *tmr,
 {
         unsigned long flags;
 
-        snd_assert(tmr, return -EINVAL);
+        if (snd_BUG_ON(!tmr))
+                return -EINVAL;
 
         snd_seq_sanity_real_time(&position);
         spin_lock_irqsave(&tmr->lock, flags);
@@ -244,7 +248,8 @@ int snd_seq_timer_set_skew(struct snd_seq_timer *tmr, unsigned int skew,
 {
         unsigned long flags;
 
-        snd_assert(tmr, return -EINVAL);
+        if (snd_BUG_ON(!tmr))
+                return -EINVAL;
 
         /* FIXME */
         if (base != SKEW_BASE) {
@@ -265,7 +270,8 @@ int snd_seq_timer_open(struct snd_seq_queue *q)
         int err;
 
         tmr = q->timer;
-        snd_assert(tmr != NULL, return -EINVAL);
+        if (snd_BUG_ON(!tmr))
+                return -EINVAL;
         if (tmr->timeri)
                 return -EBUSY;
         sprintf(str, "sequencer queue %i", q->queue);
@@ -302,7 +308,8 @@ int snd_seq_timer_close(struct snd_seq_queue *q)
         struct snd_seq_timer *tmr;
         
         tmr = q->timer;
-        snd_assert(tmr != NULL, return -EINVAL);
+        if (snd_BUG_ON(!tmr))
+                return -EINVAL;
         if (tmr->timeri) {
                 snd_timer_stop(tmr->timeri);
                 snd_timer_close(tmr->timeri);
@@ -328,7 +335,8 @@ static int initialize_timer(struct snd_seq_timer *tmr)
         unsigned long freq;
 
         t = tmr->timeri->timer;
-        snd_assert(t, return -EINVAL);
+        if (snd_BUG_ON(!t))
+                return -EINVAL;
 
         freq = tmr->preferred_resolution;
         if (!freq)
diff --git a/sound/core/sound.c b/sound/core/sound.c
index 838dd9ee957..c0685e2f0af 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -206,20 +206,23 @@ static int snd_kernel_minor(int type, struct snd_card *card, int dev)
                 minor = type;
                 break;
         case SNDRV_DEVICE_TYPE_CONTROL:
-                snd_assert(card != NULL, return -EINVAL);
+                if (snd_BUG_ON(!card))
+                        return -EINVAL;
                 minor = SNDRV_MINOR(card->number, type);
                 break;
         case SNDRV_DEVICE_TYPE_HWDEP:
         case SNDRV_DEVICE_TYPE_RAWMIDI:
         case SNDRV_DEVICE_TYPE_PCM_PLAYBACK:
         case SNDRV_DEVICE_TYPE_PCM_CAPTURE:
-                snd_assert(card != NULL, return -EINVAL);
+                if (snd_BUG_ON(!card))
+                        return -EINVAL;
                 minor = SNDRV_MINOR(card->number, type + dev);
                 break;
         default:
                 return -EINVAL;
         }
-        snd_assert(minor >= 0 && minor < SNDRV_OS_MINORS, return -EINVAL);
+        if (snd_BUG_ON(minor < 0 || minor >= SNDRV_OS_MINORS))
+                return -EINVAL;
         return minor;
 }
 #endif
@@ -247,7 +250,8 @@ int snd_register_device_for_dev(int type, struct snd_card *card, int dev,
         int minor;
         struct snd_minor *preg;
 
-        snd_assert(name, return -EINVAL);
+        if (snd_BUG_ON(!name))
+                return -EINVAL;
         preg = kmalloc(sizeof *preg, GFP_KERNEL);
         if (preg == NULL)
                 return -ENOMEM;
diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c
index 7be51546eb9..7fe12264ff8 100644
--- a/sound/core/sound_oss.c
+++ b/sound/core/sound_oss.c
@@ -64,7 +64,8 @@ static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
 
         switch (type) {
         case SNDRV_OSS_DEVICE_TYPE_MIXER:
-                snd_assert(card != NULL && dev <= 1, return -EINVAL);
+                if (snd_BUG_ON(!card || dev < 0 || dev > 1))
+                        return -EINVAL;
                 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER));
                 break;
         case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
@@ -74,11 +75,13 @@ static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
                 minor = SNDRV_MINOR_OSS_MUSIC;
                 break;
         case SNDRV_OSS_DEVICE_TYPE_PCM:
-                snd_assert(card != NULL && dev <= 1, return -EINVAL);
+                if (snd_BUG_ON(!card || dev < 0 || dev > 1))
+                        return -EINVAL;
                 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM));
                 break;
         case SNDRV_OSS_DEVICE_TYPE_MIDI:
-                snd_assert(card != NULL && dev <= 1, return -EINVAL);
+                if (snd_BUG_ON(!card || dev < 0 || dev > 1))
+                        return -EINVAL;
                 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI));
                 break;
         case SNDRV_OSS_DEVICE_TYPE_DMFM:
@@ -90,7 +93,8 @@ static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
         default:
                 return -EINVAL;
         }
-        snd_assert(minor >= 0 && minor < SNDRV_OSS_MINORS, return -EINVAL);
+        if (snd_BUG_ON(minor < 0 || minor >= SNDRV_OSS_MINORS))
+                return -EINVAL;
         return minor;
 }
 
diff --git a/sound/core/timer.c b/sound/core/timer.c
index 0af337efc64..b8ee49c1f85 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -306,7 +306,8 @@ int snd_timer_close(struct snd_timer_instance *timeri)
         struct snd_timer *timer = NULL;
         struct snd_timer_instance *slave, *tmp;
 
-        snd_assert(timeri != NULL, return -ENXIO);
+        if (snd_BUG_ON(!timer))
+                return -ENXIO;
 
         /* force to stop the timer */
         snd_timer_stop(timeri);
@@ -385,8 +386,9 @@ static void snd_timer_notify1(struct snd_timer_instance *ti, int event)
                 do_posix_clock_monotonic_gettime(&tstamp);
         else
                 getnstimeofday(&tstamp);
-        snd_assert(event >= SNDRV_TIMER_EVENT_START &&
-                   event <= SNDRV_TIMER_EVENT_PAUSE, return);
+        if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START ||
+                       event > SNDRV_TIMER_EVENT_PAUSE))
+                return;
         if (event == SNDRV_TIMER_EVENT_START ||
             event == SNDRV_TIMER_EVENT_CONTINUE)
                 resolution = snd_timer_resolution(ti);
@@ -474,7 +476,8 @@ static int _snd_timer_stop(struct snd_timer_instance * timeri,
         struct snd_timer *timer;
         unsigned long flags;
 
-        snd_assert(timeri != NULL, return -ENXIO);
+        if (snd_BUG_ON(!timeri))
+                return -ENXIO;
 
         if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) {
                 if (!keep_flag) {
@@ -758,9 +761,10 @@ int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid,
                 .dev_disconnect = snd_timer_dev_disconnect,
         };
 
-        snd_assert(tid != NULL, return -EINVAL);
-        snd_assert(rtimer != NULL, return -EINVAL);
-        *rtimer = NULL;
+        if (snd_BUG_ON(!tid))
+                return -EINVAL;
+        if (rtimer)
+                *rtimer = NULL;
         timer = kzalloc(sizeof(*timer), GFP_KERNEL);
         if (timer == NULL) {
                 snd_printk(KERN_ERR "timer: cannot allocate\n");
@@ -788,13 +792,15 @@ int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid,
                         return err;
                 }
         }
-        *rtimer = timer;
+        if (rtimer)
+                *rtimer = timer;
         return 0;
 }
 
 static int snd_timer_free(struct snd_timer *timer)
 {
-        snd_assert(timer != NULL, return -ENXIO);
+        if (!timer)
+                return 0;
 
         mutex_lock(&register_mutex);
         if (! list_empty(&timer->open_list_head)) {
@@ -827,8 +833,8 @@ static int snd_timer_dev_register(struct snd_device *dev)
         struct snd_timer *timer = dev->device_data;
         struct snd_timer *timer1;
 
-        snd_assert(timer != NULL && timer->hw.start != NULL &&
-                   timer->hw.stop != NULL, return -ENXIO);
+        if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop))
+                return -ENXIO;
         if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) &&
             !timer->hw.resolution && timer->hw.c_resolution == NULL)
                 return -EINVAL;
@@ -879,8 +885,9 @@ void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstam
 
         if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE))
                 return;
-        snd_assert(event >= SNDRV_TIMER_EVENT_MSTART &&
-                   event <= SNDRV_TIMER_EVENT_MRESUME, return);
+        if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART ||
+                       event > SNDRV_TIMER_EVENT_MRESUME))
+                return;
         spin_lock_irqsave(&timer->lock, flags);
         if (event == SNDRV_TIMER_EVENT_MSTART ||
             event == SNDRV_TIMER_EVENT_MCONTINUE ||
diff --git a/sound/core/timer_compat.c b/sound/core/timer_compat.c
index 5512f5373c5..e05802ae6e1 100644
--- a/sound/core/timer_compat.c
+++ b/sound/core/timer_compat.c
@@ -40,9 +40,11 @@ static int snd_timer_user_info_compat(struct file *file,
         struct snd_timer *t;
 
         tu = file->private_data;
-        snd_assert(tu->timeri != NULL, return -ENXIO);
+        if (snd_BUG_ON(!tu->timeri))
+                return -ENXIO;
         t = tu->timeri->timer;
-        snd_assert(t != NULL, return -ENXIO);
+        if (snd_BUG_ON(!t))
+                return -ENXIO;
         memset(&info, 0, sizeof(info));
         info.card = t->card ? t->card->number : -1;
         if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
@@ -71,7 +73,8 @@ static int snd_timer_user_status_compat(struct file *file,
         struct snd_timer_status status;
         
         tu = file->private_data;
-        snd_assert(tu->timeri != NULL, return -ENXIO);
+        if (snd_BUG_ON(!tu->timeri))
+                return -ENXIO;
         memset(&status, 0, sizeof(status));
         status.tstamp = tu->tstamp;
         status.resolution = snd_timer_resolution(tu->timeri);