[PATCH v4.4.x] ASoC: intel: Fix PM and non-atomic crash in bytcr drivers

[Takashi Iwai <tiwai@suse.de>]

commit 6e4cac23c5a648d50b107d1b53e9c4e1120c7943 upstream.

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.

[tiwai: applied only to bytcr_rt5640 as bytcr_rt5651 isn't present in
 4.4.x yet]

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: <stable@vger.kernel.org> # v4.1+
---

This is the patch modified to be applicable to 4.4.x that failed in
your previous queue.

 sound/soc/intel/boards/bytcr_rt5640.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/intel/boards/bytcr_rt5640.c b/sound/soc/intel/boards/bytcr_rt5640.c
index 7a5c9a36c1db..daba8c56b43b 100644
--- a/sound/soc/intel/boards/bytcr_rt5640.c
+++ b/sound/soc/intel/boards/bytcr_rt5640.c
@@ -139,7 +139,7 @@ static struct snd_soc_dai_link byt_dailink[] = {
 		.codec_dai_name = "snd-soc-dummy-dai",
 		.codec_name = "snd-soc-dummy",
 		.platform_name = "sst-mfld-platform",
-		.ignore_suspend = 1,
+		.nonatomic = true,
 		.dynamic = 1,
 		.dpcm_playback = 1,
 		.dpcm_capture = 1,
@@ -166,6 +166,7 @@ static struct snd_soc_dai_link byt_dailink[] = {
 						| SND_SOC_DAIFMT_CBS_CFS,
 		.be_hw_params_fixup = byt_codec_fixup,
 		.ignore_suspend = 1,
+		.nonatomic = true,
 		.dpcm_playback = 1,
 		.dpcm_capture = 1,
 		.ops = &byt_be_ssp2_ops,
-- 
2.12.2