4.4-stable review patch. If anyone has any objections, please let me know.
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From: Omar Sandoval osandov@fb.com
[ Upstream commit 71327f547ee3a46ec5c39fdbbd268401b2578d0e ]
Move queue allocation next to disk allocation to fix a couple of issues:
- If add_disk() hasn't been called, we should clear disk->queue before calling put_disk(). - If we fail to allocate a request queue, we still need to put all of the disks, not just the ones that we allocated queues for.
Signed-off-by: Omar Sandoval osandov@fb.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/block/ataflop.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-)
--- a/drivers/block/ataflop.c +++ b/drivers/block/ataflop.c @@ -1933,6 +1933,11 @@ static int __init atari_floppy_init (voi unit[i].disk = alloc_disk(1); if (!unit[i].disk) goto Enomem; + + unit[i].disk->queue = blk_init_queue(do_fd_request, + &ataflop_lock); + if (!unit[i].disk->queue) + goto Enomem; }
if (UseTrackbuffer < 0) @@ -1964,10 +1969,6 @@ static int __init atari_floppy_init (voi sprintf(unit[i].disk->disk_name, "fd%d", i); unit[i].disk->fops = &floppy_fops; unit[i].disk->private_data = &unit[i]; - unit[i].disk->queue = blk_init_queue(do_fd_request, - &ataflop_lock); - if (!unit[i].disk->queue) - goto Enomem; set_capacity(unit[i].disk, MAX_DISK_SIZE * 2); add_disk(unit[i].disk); } @@ -1982,13 +1983,17 @@ static int __init atari_floppy_init (voi
return 0; Enomem: - while (i--) { - struct request_queue *q = unit[i].disk->queue; + do { + struct gendisk *disk = unit[i].disk;
- put_disk(unit[i].disk); - if (q) - blk_cleanup_queue(q); - } + if (disk) { + if (disk->queue) { + blk_cleanup_queue(disk->queue); + disk->queue = NULL; + } + put_disk(unit[i].disk); + } + } while (i--);
unregister_blkdev(FLOPPY_MAJOR, "fd"); return -ENOMEM;