tree c8a1f22b1fcdc1335d12a0b41889ec5098176d8b
parent b33fcf1c9d359374ef6e8e7ec1e0b6f7a8717e16
author Pavel Shilovsky <pshilovsky@samba.org> 1373527065 +0400
committer Steve French <smfrench@gmail.com> 1373583941 -0500

CIFS: Fix a deadlock when a file is reopened

If we request reading or writing on a file that needs to be
reopened, it causes the deadlock: we are already holding rw
semaphore for reading and then we try to acquire it for writing
in cifs_relock_file. Fix this by acquiring the semaphore for
reading in cifs_relock_file due to we don't make any changes in
locks and don't need a write access.

CC: <stable@vger.kernel.org>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>