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From: Jia-Ju Bai <baijiaju1990@163.com>
Subject: [BUG] haswell: A possible sleep-in-atomic bug in hsw_irq_thread
To: yang.jie@linux.intel.com, lgirdwood@gmail.com, broonie@kernel.org,
        perex@perex.cz, tiwai@suse.com
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        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Date: Sun, 8 Oct 2017 23:06:38 +0800
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According to sst-haswell-ipc.c, the driver may sleep under a spinlock,
and the function call path is:
hsw_irq_thread (acquire the spinlock)
   hsw_process_notification
     hsw_log_message
       mutex_lock --> may sleep

This bug is found by my static analysis tool and my code review.


Thanks,
Jia-Ju Bai