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From: Jia-Ju Bai <baijiaju1990@gmail.com>
To: lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz,
	tiwai@suse.com, arnaud.pouliquen@st.com,
	dan.carpenter@oracle.com
Cc: alsa-devel@alsa-project.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [BUG] soc/sti: a possible sleep-in-atomic bug in uni_player_ctl_iec958_put
Date: Tue, 12 Dec 2017 22:27:47 +0800	[thread overview]
Message-ID: <425ee21c-b6c2-640b-15fd-6ff84b79a986@gmail.com> (raw)

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.


Thanks,
Jia-Ju Bai

             reply	other threads:[~2017-12-12 14:28 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-12 14:27 Jia-Ju Bai [this message]
2017-12-12 16:11 ` Arnaud Pouliquen

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