[alsa-devel] [PATCH] ASoC: intel: Fix PM and non-atomic crash in bytcr drivers

[Vinod Koul]

On Mon, Apr 24, 2017 at 02:09:55PM +0200, Takashi Iwai wrote:
> The FE setups of Intel SST bytcr_rt5640 and bytcr_rt5651 drivers carry
> the ignore_suspend flag, and this prevents the suspend/resume working
> properly while the stream is running, since SST core code has the
> check of the running streams and returns -EBUSY.  Drop these
> superfluous flags for fixing the behavior.
> 
> Also, the bytcr_rt5640 driver lacks of nonatomic flag in some FE
> definitions, which leads to the kernel Oops at suspend/resume like:
> 
>   BUG: scheduling while atomic: systemd-sleep/3144/0x00000003
>   Call Trace:
>    dump_stack+0x5c/0x7a
>    __schedule_bug+0x55/0x70
>    __schedule+0x63c/0x8c0
>    schedule+0x3d/0x90
>    schedule_timeout+0x16b/0x320
>    ? del_timer_sync+0x50/0x50
>    ? sst_wait_timeout+0xa9/0x170 [snd_intel_sst_core]
>    ? sst_wait_timeout+0xa9/0x170 [snd_intel_sst_core]
>    ? remove_wait_queue+0x60/0x60
>    ? sst_prepare_and_post_msg+0x275/0x960 [snd_intel_sst_core]
>    ? sst_pause_stream+0x9b/0x110 [snd_intel_sst_core]
>    ....
> 
> This patch addresses these appropriately, too.

Acked-by: Vinod Koul <vinod.koul at intel.com>

-- 
~Vinod