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Date: Tue, 12 Dec 2017 17:52:04 +0800
From: Jia-Ju Bai <baijiaju1990@...il.com>
To: nicolas.ferre@...rochip.com, lgirdwood@...il.com,
broonie@...nel.org, perex@...ex.cz, tiwai@...e.com,
alexandre.belloni@...e-electrons.com, sedji.gaouaou@...el.com
Cc: alsa-devel@...a-project.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: [BUG] atmel_ssc_dai: a possible sleep-in-atomic bug in
atmel_ssc_shutdown
According to sound/soc/atmel/atmel_ssc_dai.c, the driver may sleep under
a spinlock.
The function call path is:
atmel_ssc_shutdown (acquire the spinlock)
free_irq --> 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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