[PATCH 4.18 068/350] swim: fix cleanup on setup error

From: Greg Kroah-Hartman
Date: Sun Nov 11 2018 - 18:40:07 EST


4.18-stable review patch. If anyone has any objections, please let me know.

------------------

From: Omar Sandoval <osandov@xxxxxx>

[ Upstream commit 1448a2a5360ae06f25e2edc61ae070dff5c0beb4 ]

If we fail to allocate the request queue for a disk, we still need to
free that disk, not just the previous ones. Additionally, we need to
cleanup the previous request queues.

Signed-off-by: Omar Sandoval <osandov@xxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/block/swim.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)

--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -887,8 +887,17 @@ static int swim_floppy_init(struct swim_

exit_put_disks:
unregister_blkdev(FLOPPY_MAJOR, "fd");
- while (drive--)
- put_disk(swd->unit[drive].disk);
+ do {
+ struct gendisk *disk = swd->unit[drive].disk;
+
+ if (disk) {
+ if (disk->queue) {
+ blk_cleanup_queue(disk->queue);
+ disk->queue = NULL;
+ }
+ put_disk(disk);
+ }
+ } while (drive--);
return err;
}