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authorHeinz Mauelshagen <heinzm@redhat.com>2016-05-03 19:43:57 +0200
committerShaohua Li <shli@fb.com>2016-05-09 09:23:23 -0700
commit092398dce8c2406bfb0c9eebc3e764ff2ddb62a8 (patch)
treeacd59a4aedd6a948955d31d8cfe007c52f0fec29 /drivers/md/md.c
parentbc47e84258be3e49c14be65a111f2117ecc986f6 (diff)
downloadop-kernel-dev-092398dce8c2406bfb0c9eebc3e764ff2ddb62a8.zip
op-kernel-dev-092398dce8c2406bfb0c9eebc3e764ff2ddb62a8.tar.gz
md: md.c: fix oops in mddev_suspend for raid0
Introduced by upstream commit 70d9798b95562abac005d4ba71d28820f9a201eb The raid0 personality does not create mddev->thread as oposed to other personalities leading to its unconditional access in mddev_suspend() causing an oops. Patch checks for mddev->thread in order to keep the intention of aforementioned commit. Fixes: 70d9798b9556 ("MD: warn for potential deadlock") Cc: stable@vger.kernel.org (4.5+) Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 06f6e81..23c6d73 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -307,7 +307,7 @@ static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio)
*/
void mddev_suspend(struct mddev *mddev)
{
- WARN_ON_ONCE(current == mddev->thread->tsk);
+ WARN_ON_ONCE(mddev->thread && current == mddev->thread->tsk);
if (mddev->suspended++)
return;
synchronize_rcu();
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