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Subject[PATCH 4.4 03/20] ASoC: intel: Fix PM and non-atomic crash in bytcr drivers
Date
4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: 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+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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(-)

--- 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_daili
.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_daili
| 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,

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