According to drivers/input/misc/pcap_keys.c, the kernel module may sleep
in the interrupt handler.
The function call path is:
pcap_keys_handler (interrupt handler)
ezx_pcap_read
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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