tag 125c906207a17dad3a5415afc291f7e294967f74
tagger Sasha Levin <alexander.levin@microsoft.com> Sun Feb 04 10:58:11 2018 -0500
object 0f45bcb0408641cd67f098d5b3f15572f3fb578b

for-greg-4.14-04022018

commit 0f45bcb0408641cd67f098d5b3f15572f3fb578b
author Jia-Ju Bai <baijiaju1990@163.com> Tue Dec 12 16:49:52 2017 +0800
committer Sasha Levin <alexander.levin@microsoft.com> Sun Feb 04 10:57:17 2018 -0500
tree 26ad6c26a4766103bd65f23e447f7b44e9cdff7d
parent fa661eae42872662510ac30b347670ba71344acf

hippi: Fix a Fix a possible sleep-in-atomic bug in rr_close

[ Upstream commit 6e266610eb6553cfb7e7eb5d11914bd01509c406 ]

The driver may sleep under a spinlock.
The function call path is:
rr_close (acquire the spinlock)
  free_irq --> may sleep

To fix it, free_irq is moved to the place without holding the spinlock.

This bug is found by my static analysis tool(DSAC) and checked by my code review.

Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>