sound: Revert "ALSA: Fix limit of 8 PCM devices in SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE"

This reverts commit fb3d6f2b77bdec75d45aa9d4464287ed87927866.

New, updated patch with same subject replaces this commit.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

3 files changed, 20 insertions, 42 deletions

diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 4ccd761a5f41..4c601b192ddf 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -2947,7 +2947,7 @@ static void register_oss_dsp(struct snd_pcm *pcm, int index)
 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
 {
         pcm->oss.reg = 0;
-        if (dsp_map[pcm->card->number] == pcm->device) {
+        if (dsp_map[pcm->card->number] == (int)pcm->device) {
                 char name[128];
                 int duplex;
                 register_oss_dsp(pcm, 0);
@@ -2963,7 +2963,7 @@ static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
                 pcm->oss.reg++;
                 pcm->oss.reg_mask |= 1;
         }
-        if (adsp_map[pcm->card->number] == pcm->device) {
+        if (adsp_map[pcm->card->number] == (int)pcm->device) {
                 register_oss_dsp(pcm, 1);
                 pcm->oss.reg++;
                 pcm->oss.reg_mask |= 2;
@@ -2988,7 +2988,7 @@ static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
                                                   pcm->card, 1);
                 }
-                if (dsp_map[pcm->card->number] == pcm->device) {
+                if (dsp_map[pcm->card->number] == (int)pcm->device) {
 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
 #endif
@@ -3019,12 +3019,12 @@ static int __init alsa_pcm_oss_init(void)
 
         /* check device map table */
         for (i = 0; i < SNDRV_CARDS; i++) {
-                if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_OS_MINORS) {
+                if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
                                    i, dsp_map[i]);
                         dsp_map[i] = 0;
                 }
-                if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_OS_MINORS) {
+                if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
                                    i, adsp_map[i]);
                         adsp_map[i] = 1;
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 24271a3bd901..ece25c718e95 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -42,7 +42,7 @@ static int snd_pcm_dev_free(struct snd_device *device);
 static int snd_pcm_dev_register(struct snd_device *device);
 static int snd_pcm_dev_disconnect(struct snd_device *device);
 
-static inline struct snd_pcm *snd_pcm_get(struct snd_card *card, int device)
+static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device)
 {
         struct snd_pcm *pcm;
 
@@ -53,37 +53,6 @@ static inline struct snd_pcm *snd_pcm_get(struct snd_card *card, int device)
         return NULL;
 }
 
-static inline int snd_pcm_next(struct snd_card *card, int device)
-{
-        struct snd_pcm *pcm;
-
-        list_for_each_entry(pcm, &snd_pcm_devices, list) {
-                if (pcm->card == card && pcm->device > device)
-                        return pcm->device;
-                else if (pcm->card->number > card->number)
-                        return -1;
-        }
-        return -1;
-}
-
-static inline int snd_pcm_add(struct snd_pcm *newpcm)
-{
-        struct snd_pcm *pcm;
-
-        list_for_each_entry(pcm, &snd_pcm_devices, list) {
-                if (pcm->card == newpcm->card && pcm->device == newpcm->device)
-                        return -EBUSY;
-                if (pcm->card->number > newpcm->card->number ||
-                                (pcm->card == newpcm->card &&
-                                pcm->device > newpcm->device)) {
-                        list_add(&newpcm->list, pcm->list.prev);
-                        return 0;
-                }
-        }
-        list_add_tail(&newpcm->list, &snd_pcm_devices);
-        return 0;
-}
-
 static int snd_pcm_control_ioctl(struct snd_card *card,
                                  struct snd_ctl_file *control,
                                  unsigned int cmd, unsigned long arg)
@@ -96,7 +65,14 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
                         if (get_user(device, (int __user *)arg))
                                 return -EFAULT;
                         mutex_lock(&register_mutex);
-                        device = snd_pcm_next(card, device);
+                        device = device < 0 ? 0 : device + 1;
+                        while (device < SNDRV_PCM_DEVICES) {
+                                if (snd_pcm_search(card, device))
+                                        break;
+                                device++;
+                        }
+                        if (device == SNDRV_PCM_DEVICES)
+                                device = -1;
                         mutex_unlock(&register_mutex);
                         if (put_user(device, (int __user *)arg))
                                 return -EFAULT;
@@ -122,7 +98,7 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
                         if (get_user(subdevice, &info->subdevice))
                                 return -EFAULT;
                         mutex_lock(&register_mutex);
-                        pcm = snd_pcm_get(card, device);
+                        pcm = snd_pcm_search(card, device);
                         if (pcm == NULL) {
                                 err = -ENXIO;
                                 goto _error;
@@ -955,11 +931,11 @@ static int snd_pcm_dev_register(struct snd_device *device)
 
         snd_assert(pcm != NULL && device != NULL, return -ENXIO);
         mutex_lock(&register_mutex);
-        err = snd_pcm_add(pcm);
-        if (err) {
+        if (snd_pcm_search(pcm->card, pcm->device)) {
                 mutex_unlock(&register_mutex);
-                return err;
+                return -EBUSY;
         }
+        list_add_tail(&pcm->list, &snd_pcm_devices);
         for (cidx = 0; cidx < 2; cidx++) {
                 int devtype = -1;
                 if (pcm->streams[cidx].substream == NULL)
diff --git a/sound/core/sound.c b/sound/core/sound.c
index 838dd9ee957c..1003ae375d47 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -34,6 +34,8 @@
 #include <linux/kmod.h>
 #include <linux/mutex.h>
 
+#define SNDRV_OS_MINORS 256
+
 static int major = CONFIG_SND_MAJOR;
 int snd_major;
 EXPORT_SYMBOL(snd_major);