The driver may sleep under a spinlock, and the function call path is:
snd_opl3_note_on (acquire the spinlock)
snd_opl3_find_patch
kzalloc(GFP_KERNEL) --> may sleep
To fix it, GFP_KERNEL is replaced with GFP_ATOMIC.
This bug is found by my static analysis tool and my code review.
Signed-off-by: Jia-Ju Bai <baijiaju1990@xxxxxxx>
---
sound/drivers/opl3/opl3_synth.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/drivers/opl3/opl3_synth.c b/sound/drivers/opl3/opl3_synth.c
index ddcc1a3..2e1cb2b 100644
--- a/sound/drivers/opl3/opl3_synth.c
+++ b/sound/drivers/opl3/opl3_synth.c
@@ -325,7 +325,7 @@ struct fm_patch *snd_opl3_find_patch(struct snd_opl3 *opl3, int prog, int bank,
if (!create_patch)
return NULL;
- patch = kzalloc(sizeof(*patch), GFP_KERNEL);
+ patch = kzalloc(sizeof(*patch), GFP_ATOMIC);
if (!patch)
return NULL;
patch->prog = prog;
--
1.7.9.5
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