I get this every time I boot 2.6.0-test10. I think this problem has
been around for a while.
Debug: sleeping function called from invalid context at
include/asm/semaphore.h:119
in_atomic():1, irqs_disabled():0
Call Trace:
[<c01229d0>] __might_sleep+0xab/0xc9
[<fcff57bd>] ap_cs8427_sendbytes+0x38/0xd2 [snd_ice1712]
[<fcfa825a>] snd_i2c_sendbytes+0x22/0x26 [snd_i2c]
[<fcfaf15e>] snd_cs8427_reg_read+0x2c/0x8c [snd_cs8427]
[<fcfaf414>] snd_cs8427_create+0xa4/0x347 [snd_cs8427]
[<c02dc4b0>] snd_device_new+0x20/0x6a
[<fcff151a>] snd_ice1712_init_cs8427+0x2f/0x6f [snd_ice1712]
[<fcff6153>] snd_ice1712_delta_init+0x230/0x2b9 [snd_ice1712]
[<fcff5227>] snd_ice1712_probe+0x323/0x34c [snd_ice1712]
[<c017360f>] dput+0x24/0x25f
[<c020c833>] pci_device_probe_static+0x4d/0x5e
[<c020c87c>] __pci_device_probe+0x38/0x4b
[<c020c8bb>] pci_device_probe+0x2c/0x48
[<c0272efd>] bus_match+0x3d/0x65
[<c0273016>] driver_attach+0x59/0x83
[<c02732df>] bus_add_driver+0x9e/0xb1
[<c020ca82>] pci_register_driver+0x6b/0x90
[<fcfa2015>] alsa_card_ice1712_init+0x15/0x4e [snd_ice1712]
[<c013cbc5>] sys_init_module+0x14f/0x233
[<c010b3e5>] sysenter_past_esp+0x52/0x71
The system is a P4 with HT, kernel has SMP & preempt enabled.
There are two sound cards. Here are all the snd_ drivers mentioned in
the output of lsmod:
snd_ice1712 55428 -
snd_ice17xx_ak4xxx 2880 -
snd_cs8427 8224 -
snd_i2c 4512 -
snd_ak4xxx_adda 4832 -
snd_intel8x0 28612 -
snd_ac97_codec 50660 -
snd_pcm 88352 -
snd_timer 22052 -
snd_page_alloc 8772 -
snd_mpu401_uart 6016 -
snd_rawmidi 20192 -
snd_seq_device 6440 -
--
Torrey Hoffman <[email protected]>
Torrey Hoffman <[email protected]> wrote:
>
> I get this every time I boot 2.6.0-test10. I think this problem has
> been around for a while.
>
> Debug: sleeping function called from invalid context at
> include/asm/semaphore.h:119
> in_atomic():1, irqs_disabled():0
> Call Trace:
> [<c01229d0>] __might_sleep+0xab/0xc9
> [<fcff57bd>] ap_cs8427_sendbytes+0x38/0xd2 [snd_ice1712]
> [<fcfa825a>] snd_i2c_sendbytes+0x22/0x26 [snd_i2c]
> [<fcfaf15e>] snd_cs8427_reg_read+0x2c/0x8c [snd_cs8427]
> [<fcfaf414>] snd_cs8427_create+0xa4/0x347 [snd_cs8427]
> [<c02dc4b0>] snd_device_new+0x20/0x6a
> [<fcff151a>] snd_ice1712_init_cs8427+0x2f/0x6f [snd_ice1712]
> [<fcff6153>] snd_ice1712_delta_init+0x230/0x2b9 [snd_ice1712]
> [<fcff5227>] snd_ice1712_probe+0x323/0x34c [snd_ice1712]
snd_cs8427_create() does:
snd_i2c_lock(bus);
if ((err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER)) != CS8427_VER8427A) {
the first statement takes a spinlock. snd_cs8427_reg_read() then calls
ap_cs8427_sendbytes() which downs a semaphore.
It might be more appropriate to use a semaphore for ice1712_t.gpio_mutex?
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;