tree e35522c3527e683a64b7147f78be2b73c845a98b
parent a8f57f7a556faf4d0a5032157dd193c56a24c018
author Jan Kara <jack@suse.cz> 1488991713 +0100
committer Gerrit - the friendly Code Review server <code-review@localhost> 1519805755 -0800

block: Make del_gendisk() safer for disks without queues

Commit 165a5e22fafb "block: Move bdi_unregister() to del_gendisk()"
added disk->queue dereference to del_gendisk(). Although del_gendisk()
is not supposed to be called without disk->queue valid and
blk_unregister_queue() warns in that case, this change will make it oops
instead. Return to the old more robust behavior of just warning when
del_gendisk() gets called for gendisk with disk->queue being NULL.

Change-Id: I66abdfd9dc9a9d945aed7f9722b48a77215356b2
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Tested-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Git-commit: 90f16fddcc2802726142b8386c65ccb89f044613
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>