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Date: Tue, 12 Dec 2017 20:36:41 +0800
From: Jia-Ju Bai <baijiaju1990@...il.com>
To: martyn@...chs.me.uk, manohar.vanga@...il.com,
gregkh@...uxfoundation.org, elfring@...rs.sourceforge.net,
augustocaringi@...il.com
Cc: devel@...verdev.osuosl.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [BUG] vme_ca91cx42: a possible sleep-in-atomic bug in
ca91cx42_master_set
According to drivers/vme/bridges/vme_ca91cx42.c, the driver may sleep
under a spinlock.
The function call path is:
ca91cx42_master_set (acquire the spinlock)
ca91cx42_alloc_resource
ioremap_nocache --> 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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