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path: root/drivers/media/video/saa7134/saa7134-alsa.c
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Diffstat (limited to 'drivers/media/video/saa7134/saa7134-alsa.c')
-rw-r--r--drivers/media/video/saa7134/saa7134-alsa.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c
index 953d5fec82d..ade05f75fdb 100644
--- a/drivers/media/video/saa7134/saa7134-alsa.c
+++ b/drivers/media/video/saa7134/saa7134-alsa.c
@@ -989,6 +989,14 @@ static int saa7134_alsa_init(void)
struct saa7134_dev *dev = NULL;
struct list_head *list;
+ 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) {
@@ -1001,9 +1009,6 @@ 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");
@@ -1023,12 +1028,15 @@ 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");