* [PATCH] sound: soc: intel: bytcr_rt5640: Replace GFP_ATOMIC with GFP_KERNEL in snd_byt_rt5640_mc_probe
@ 2018-04-09 10:47 Jia-Ju Bai
0 siblings, 0 replies; only message in thread
From: Jia-Ju Bai @ 2018-04-09 10:47 UTC (permalink / raw)
To: lgirdwood, broonie, perex, tiwai, pierre-louis.bossart, vinod.koul
Cc: alsa-devel, linux-kernel, Jia-Ju Bai
snd_byt_rt5640_mc_probe() is never called in atomic context.
This function is only set as ".probe" in "struct platform_driver".
Despite never getting called from atomic context,
snd_byt_rt5640_mc_probe() calls devm_kzalloc() with GFP_ATOMIC,
which waits busily for allocation.
GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL,
to avoid busy waiting and improve the possibility of sucessful allocation.
This is found by a static analysis tool named DCNS written by myself.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
---
sound/soc/intel/boards/bytcr_rt5640.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/soc/intel/boards/bytcr_rt5640.c b/sound/soc/intel/boards/bytcr_rt5640.c
index 4a76b09..e7705e0 100644
--- a/sound/soc/intel/boards/bytcr_rt5640.c
+++ b/sound/soc/intel/boards/bytcr_rt5640.c
@@ -766,7 +766,7 @@ static int snd_byt_rt5640_mc_probe(struct platform_device *pdev)
struct byt_rt5640_private *priv;
is_bytcr = false;
- priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_ATOMIC);
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
--
1.9.1
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2018-04-09 10:47 [PATCH] sound: soc: intel: bytcr_rt5640: Replace GFP_ATOMIC with GFP_KERNEL in snd_byt_rt5640_mc_probe Jia-Ju Bai
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