[alsa-devel] [BUG] soc/sti: a possible sleep-in-atomic bug in uni_player_ctl_iec958_put

[Arnaud Pouliquen]

Hello Jia-Ju,


On 12/12/2017 03:27 PM, Jia-Ju Bai wrote:
> According to sound/soc/sti/uniperif_player.c, the driver may sleep under
> a spinlock.
> The function call path is:
> uni_player_ctl_iec958_put (acquire the spinlock)
>   uni_player_set_channel_status
>     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.
you right, mutex under spin lock is not recommended... I will have a look
Thanks!

Regards
Arnaud

> 
> 
> Thanks,
> Jia-Ju Bai