[BUG] sound/soc/samsung: a possible sleep-in-atomic bugs in s3c_pcm_hw_params

[Jia-Ju Bai]

According to sound/soc/samsung/pcm.c, the kernel module may sleep under 
a spinlock.
The function call path is:
s3c_pcm_hw_params (acquire the spinlock)
  clk_get_rate
    clk_core_get_rate
      clk_prepare_lock
        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 my code 
review.


Thanks,
Jia-Ju Bai