Re: [BUG 2.6.0-test9] sleep from invalid function (ALSA related?)

[Takashi Iwai <tiwai@suse.de>]

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At Thu, 13 Nov 2003 12:33:16 +0100,
Erik Mouw wrote:
> 
> Hi,
> 
> I compiled 2.6.0-test9 on my desktop last night. Not too many problems
> so far, but this debug trace caught my attention:
(snip)
> It looks ALSA related to me, the soundcard I use is a Midiman
> Audiophile 2496, which uses the ice1712 driver.

the attached patch should fix.
please give a try.


--
Takashi Iwai <tiwai@suse.de>		ALSA Developer - www.alsa-project.org

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diff -ru linux/include/sound linux/include/sound
--- linux/include/sound/i2c.h	23 Apr 2002 13:20:58 -0000	1.3
+++ linux/include/sound/i2c.h	13 Nov 2003 11:18:12 -0000	1.4
@@ -58,7 +58,7 @@
 	snd_card_t *card;	/* card which I2C belongs to */
 	char name[32];		/* some useful label */
 
-	spinlock_t lock;
+	struct semaphore lock_mutex;
 
 	snd_i2c_bus_t *master;	/* master bus when SCK/SCL is shared */
 	struct list_head buses;	/* master: slave buses sharing SCK/SCL, slave: link list */
@@ -84,15 +84,15 @@
 
 static inline void snd_i2c_lock(snd_i2c_bus_t *bus) {
 	if (bus->master)
-		spin_lock(&bus->master->lock);
+		down(&bus->master->lock_mutex);
 	else
-		spin_lock(&bus->lock);
+		down(&bus->lock_mutex);
 }
 static inline void snd_i2c_unlock(snd_i2c_bus_t *bus) {
 	if (bus->master)
-		spin_unlock(&bus->master->lock);
+		up(&bus->master->lock_mutex);
 	else
-		spin_unlock(&bus->lock);
+		up(&bus->lock_mutex);
 }
 
 int snd_i2c_sendbytes(snd_i2c_device_t *device, unsigned char *bytes, int count);
diff -ru linux/sound linux/sound
--- linux/sound/i2c/i2c.c	2 Jun 2003 10:04:44 -0000	1.7
+++ linux/sound/i2c/i2c.c	13 Nov 2003 11:18:25 -0000	1.8
@@ -84,7 +84,7 @@
 	bus = (snd_i2c_bus_t *)snd_magic_kcalloc(snd_i2c_bus_t, 0, GFP_KERNEL);
 	if (bus == NULL)
 		return -ENOMEM;
-	spin_lock_init(&bus->lock);
+	init_MUTEX(&bus->lock_mutex);
 	INIT_LIST_HEAD(&bus->devices);
 	INIT_LIST_HEAD(&bus->buses);
 	bus->card = card;