1 files changed, 24 insertions, 8 deletions

diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c
index 263c6e2e3e8e..ade05f75fdb0 100644
--- a/drivers/media/video/saa7134/saa7134-alsa.c
+++ b/drivers/media/video/saa7134/saa7134-alsa.c
@@ -51,6 +51,7 @@ MODULE_PARM_DESC(debug,"enable debug messages [alsa]");
 #define MIXER_ADDR_LINE2        2
 #define MIXER_ADDR_LAST         2
 
+
 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
@@ -59,11 +60,14 @@ module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
 
 #define dprintk(fmt, arg...)    if (debug) \
-        printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ## arg)
+        printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ##arg)
+
+
 
 /*
  * Main chip structure
  */
+
 typedef struct snd_card_saa7134 {
         snd_card_t *card;
         spinlock_t mixer_lock;
@@ -208,8 +212,8 @@ static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
 
 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id, struct pt_regs *regs)
 {
-        struct saa7134_dmasound *dmasound = dev_id;
-        struct saa7134_dev *dev = dmasound->priv_data;
+        struct saa7134_dmasound *dmasound = dev_id;
+        struct saa7134_dev *dev = dmasound->priv_data;
 
         unsigned long report, status;
         int loop, handled = 0;
@@ -985,7 +989,15 @@ static int saa7134_alsa_init(void)
         struct saa7134_dev *dev = NULL;
         struct list_head *list;
 
-        printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
+        if (!dmasound_init && !dmasound_exit) {
+                dmasound_init = alsa_device_init;
+                dmasound_exit = alsa_device_exit;
+        } else {
+                printk(KERN_WARNING "saa7134 ALSA: can't load, DMA sound handler already assigned (probably to OSS)\n");
+                return -EBUSY;
+        }
+
+        printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
 
         list_for_each(list,&saa7134_devlist) {
                 dev = list_entry(list, struct saa7134_dev, devlist);
@@ -997,13 +1009,11 @@ static int saa7134_alsa_init(void)
                 }
         }
 
-        dmasound_init = alsa_device_init;
-        dmasound_exit = alsa_device_exit;
-
         if (dev == NULL)
                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
 
         return 0;
+
 }
 
 /*
@@ -1018,12 +1028,18 @@ static void saa7134_alsa_exit(void)
                 snd_card_free(snd_saa7134_cards[idx]);
         }
 
+        dmasound_init = NULL;
+        dmasound_exit = NULL;
         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
 
         return;
 }
 
-module_init(saa7134_alsa_init);
+/* We initialize this late, to make sure the sound system is up and running */
+late_initcall(saa7134_alsa_init);
 module_exit(saa7134_alsa_exit);
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Ricardo Cerqueira");
+
+
+