1 From 50c99bd6aa579ece90683e488c14ac5a88a5afc6 Mon Sep 17 00:00:00 2001
2 From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 Date: Wed, 27 Feb 2019 15:02:03 +0100
4 Subject: Revert "loop: Fold __loop_release into loop_release"
6 From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
8 This reverts commit 7d839c10b848aa66ca1290a21ee600bd17c2dcb4 which is
9 commit 967d1dc144b50ad005e5eecdfadfbcfb399ffff6 upstream.
11 It does not work properly in the 4.9.y tree and causes more problems
12 than it fixes, so revert it.
14 Reported-by: Thomas Lindroth <thomas.lindroth@gmail.com>
15 Reported-by: Jan Kara <jack@suse.cz>
16 Cc: Jens Axboe <axboe@kernel.dk>
17 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
19 drivers/block/loop.c | 16 +++++++++-------
20 1 file changed, 9 insertions(+), 7 deletions(-)
22 --- a/drivers/block/loop.c
23 +++ b/drivers/block/loop.c
24 @@ -1575,15 +1575,12 @@ out:
28 -static void lo_release(struct gendisk *disk, fmode_t mode)
29 +static void __lo_release(struct loop_device *lo)
31 - struct loop_device *lo;
34 - mutex_lock(&loop_index_mutex);
35 - lo = disk->private_data;
36 if (atomic_dec_return(&lo->lo_refcnt))
40 mutex_lock(&loop_ctl_mutex);
41 if (lo->lo_flags & LO_FLAGS_AUTOCLEAR) {
42 @@ -1593,7 +1590,7 @@ static void lo_release(struct gendisk *d
44 err = loop_clr_fd(lo);
50 * Otherwise keep thread (if running) and config,
51 @@ -1603,7 +1600,12 @@ static void lo_release(struct gendisk *d
54 mutex_unlock(&loop_ctl_mutex);
58 +static void lo_release(struct gendisk *disk, fmode_t mode)
60 + mutex_lock(&loop_index_mutex);
61 + __lo_release(disk->private_data);
62 mutex_unlock(&loop_index_mutex);