Patch "ASoC: intel: Fix PM and non-atomic crash in bytcr drivers" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

ASoC: intel: Fix PM and non-atomic crash in bytcr drivers

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
asoc-intel-fix-pm-and-non-atomic-crash-in-bytcr-drivers.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Takashi Iwai <[email protected]>
Date: Mon, 24 Apr 2017 14:09:55 +0200
Subject: ASoC: intel: Fix PM and non-atomic crash in bytcr drivers

From: Takashi Iwai <[email protected]>

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]

---

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(-)

@@ -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,

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/asoc-intel-fix-pm-and-non-atomic-crash-in-bytcr-drivers.patch