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Date:   Thu, 11 May 2023 20:08:36 +0800
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Subject: [PATCH 1/6] ASoC: soc-pcm: use GFP_ATOMIC for dpcm structure
From:   yixuanjiang <yixuanjiang@google.com>
To:     tiwai@suse.com, lgirdwood@gmail.com, broonie@kernel.org
Cc:     linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org,
        Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
        Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>,
        Kai Vehmanen <kai.vehmanen@linux.intel.com>,
        Bard Liao <yung-chuan.liao@linux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
        Yixuan Jiang <yixuanjiang@google.com>, stable@vger.kernel.org
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From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

[ Upstream commit d8a9c6e1f6766a16cf02b4e99a629f3c5512c183 ]

We allocate a structure in dpcm_be_connect(), which may be called in
atomic context. Using GFP_KERNEL is not quite right, we have to use
GFP_ATOMIC to prevent the allocator from sleeping.

Suggested-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20211207173745.15850-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Fixes: aa9ff6a4955f ("ASoC: soc-compress: Reposition and add pcm_mutex")
Signed-off-by: Yixuan Jiang <yixuanjiang@google.com>
Cc: stable@vger.kernel.org # 5.15+
---
 sound/soc/soc-pcm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 3b673477f6215..cffae9b7c2548 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1132,7 +1132,7 @@ static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
 			return 0;
 	}
 
-	dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
+	dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_ATOMIC);
 	if (!dpcm)
 		return -ENOMEM;
 
-- 
2.40.1.521.gf1e218fcd8-goog