1 files changed, 52 insertions, 6 deletions

diff --git a/drivers/media/video/saa7134/saa7134-oss.c b/drivers/media/video/saa7134/saa7134-oss.c
index 513a699a6df2..7448e386a804 100644
--- a/drivers/media/video/saa7134/saa7134-oss.c
+++ b/drivers/media/video/saa7134/saa7134-oss.c
@@ -373,6 +373,42 @@ static ssize_t dsp_write(struct file *file, const char __user *buffer,
 	return -EINVAL;
 }
 
+static const char *osspcm_ioctls[] = {
+	"RESET", "SYNC", "SPEED", "STEREO", "GETBLKSIZE", "SETFMT",
+	"CHANNELS", "?", "POST", "SUBDIVIDE", "SETFRAGMENT", "GETFMTS",
+	"GETOSPACE", "GETISPACE", "NONBLOCK", "GETCAPS", "GET/SETTRIGGER",
+	"GETIPTR", "GETOPTR", "MAPINBUF", "MAPOUTBUF", "SETSYNCRO",
+	"SETDUPLEX", "GETODELAY"
+};
+#define OSSPCM_IOCTLS ARRAY_SIZE(osspcm_ioctls)
+
+static void saa7134_oss_print_ioctl(char *name, unsigned int cmd)
+{
+	char *dir;
+
+	switch (_IOC_DIR(cmd)) {
+	case _IOC_NONE:              dir = "--"; break;
+	case _IOC_READ:              dir = "r-"; break;
+	case _IOC_WRITE:             dir = "-w"; break;
+	case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
+	default:                     dir = "??"; break;
+	}
+	switch (_IOC_TYPE(cmd)) {
+	case 'P':
+		printk(KERN_DEBUG "%s: ioctl 0x%08x (oss dsp, %s, SNDCTL_DSP_%s)\n",
+		       name, cmd, dir, (_IOC_NR(cmd) < OSSPCM_IOCTLS) ?
+		       osspcm_ioctls[_IOC_NR(cmd)] : "???");
+		break;
+	case 'M':
+		printk(KERN_DEBUG "%s: ioctl 0x%08x (oss mixer, %s, #%d)\n",
+		       name, cmd, dir, _IOC_NR(cmd));
+		break;
+	default:
+		printk(KERN_DEBUG "%s: ioctl 0x%08x (???, %s, #%d)\n",
+		       name, cmd, dir, _IOC_NR(cmd));
+	}
+}
+
 static int dsp_ioctl(struct inode *inode, struct file *file,
 		     unsigned int cmd, unsigned long arg)
 {
@@ -382,7 +418,7 @@ static int dsp_ioctl(struct inode *inode, struct file *file,
 	int val = 0;
 
 	if (debug > 1)
-		saa7134_print_ioctl(dev->name,cmd);
+		saa7134_oss_print_ioctl(dev->name,cmd);
 	switch (cmd) {
 	case OSS_GETVERSION:
 		return put_user(SOUND_VERSION, p);
@@ -678,7 +714,7 @@ static int mixer_ioctl(struct inode *inode, struct file *file,
 	int __user *p = argp;
 
 	if (debug > 1)
-		saa7134_print_ioctl(dev->name,cmd);
+		saa7134_oss_print_ioctl(dev->name,cmd);
 	switch (cmd) {
 	case OSS_GETVERSION:
 		return put_user(SOUND_VERSION, p);
@@ -959,8 +995,17 @@ static int saa7134_oss_init(void)
 	struct saa7134_dev *dev = NULL;
 	struct list_head *list;
 
+	if (!dmasound_init && !dmasound_exit) {
+		dmasound_init = oss_device_init;
+		dmasound_exit = oss_device_exit;
+	} else {
+		printk(KERN_WARNING "saa7134 OSS: can't load, DMA sound handler already assigned (probably to ALSA)\n");
+		return -EBUSY;
+	}
+
 	printk(KERN_INFO "saa7134 OSS driver for DMA sound loaded\n");
 
+
 	list_for_each(list,&saa7134_devlist) {
 		dev = list_entry(list, struct saa7134_dev, devlist);
 		if (dev->dmasound.priv_data == NULL) {
@@ -974,9 +1019,6 @@ static int saa7134_oss_init(void)
 	if (dev == NULL)
 		printk(KERN_INFO "saa7134 OSS: no saa7134 cards found\n");
 
-	dmasound_init = oss_device_init;
-	dmasound_exit = oss_device_exit;
-
 	return 0;
 
 }
@@ -997,12 +1039,16 @@ static void saa7134_oss_exit(void)
 
 	}
 
+	dmasound_init = NULL;
+	dmasound_exit = NULL;
+
 	printk(KERN_INFO "saa7134 OSS driver for DMA sound unloaded\n");
 
 	return;
 }
 
-module_init(saa7134_oss_init);
+/* We initialize this late, to make sure the sound system is up and running */
+late_initcall(saa7134_oss_init);
 module_exit(saa7134_oss_exit);
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");