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Subject[BUG] cx88: a possible sleep-in-atomic bug in snd_cx88_switch_put
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The driver may sleep under a spinlock.
The function call path is:
snd_cx88_switch_put (acquire the spinlock)
v4l2_ctrl_find
mutex_lock --> may sleep

I do not find a good way to fix it, so I only report.
This possible bug is found by my static analysis tool (DSAC) and checked
by my code review.


Thanks,
Jia-Ju Bai

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