From: Anton Vorontsov avorontsov@ru.mvista.com
This patch fixes following bug caught with PREEMPT enabled:
root@b1:~# cat /dev/dsp > /dev/null BUG: scheduling while atomic: cat/965/0x00000003 Call Trace: [df165ce0] [c0008e84] show_stack+0x4c/0x1ac (unreliable) [df165d20] [c001c18c] __schedule_bug+0x64/0x78 [df165d30] [c02b3344] schedule+0x2d8/0x334 [df165d70] [c02b3674] schedule_timeout+0x64/0xe4 [df165db0] [c002c05c] msleep+0x1c/0x34 [df165dc0] [c01f2fe0] fsl_ssi_trigger+0x130/0x144 [df165dd0] [c01ece54] soc_pcm_trigger+0x94/0xb8 [df165df0] [c01da764] snd_pcm_do_start+0x48/0x60 [df165e00] [c01da630] snd_pcm_action_single+0x4c/0xb4 [df165e20] [c01e0f50] snd_pcm_lib_read1+0x2a0/0x2d4 [df165e70] [c01ec274] snd_pcm_oss_read3+0xf0/0x13c [df165eb0] [c01ec2e4] snd_pcm_oss_read2+0x24/0x4c [df165ec0] [c01ec4ac] snd_pcm_oss_read+0x1a0/0x1f0 [df165ef0] [c0076478] vfs_read+0xb4/0x108 [df165f10] [c00768cc] sys_read+0x4c/0x90 [df165f40] [c00117a4] ret_from_syscall+0x0/0x38
Acked-by: Timur Tabi timur@freescale.com Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/soc/fsl/fsl_ssi.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index b2a11b0..f588545 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -416,7 +416,7 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd) * to put data into its FIFO. Without it, ALSA starts * to complain about overruns. */ - msleep(1); + mdelay(1); } break;