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Date: Tue, 12 Dec 2017 22:19:42 +0800
From: Jia-Ju Bai <baijiaju1990@...il.com>
To: yang.jie@...ux.intel.com, lgirdwood@...il.com, broonie@...nel.org,
perex@...ex.cz, tiwai@...e.com
Cc: alsa-devel@...a-project.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [BUG] haswell: a possible sleep-in-atomic bug in hsw_irq_thread
According to sound/soc/intel/haswell/sst-haswell-ipc.c, the driver may
sleep under a spinlock.
The function call path is:
hsw_irq_thread (acquire the spinlock)
hsw_process_notification
hsw_log_message
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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