From b54e1f88897bcacc2cd359f48ea3b39eaf55f084 Mon Sep 17 00:00:00 2001 From: Herton Ronaldo Krzesinski Date: Mon, 27 Aug 2012 20:56:51 -0300 Subject: [PATCH] floppy: don't call alloc_ordered_workqueue inside the alloc_disk loop Since commit 070ad7e ("floppy: convert to delayed work and single-thread wq"), we end up calling alloc_ordered_workqueue multiple times inside the loop, which shouldn't be intended. Besides the leak, other side effect in the current code is if blk_init_queue fails, we would end up calling unregister_blkdev even if we didn't call yet register_blkdev. Just moved the allocation of floppy_wq before the loop, and adjusted the code accordingly. Cc: stable@vger.kernel.org # 3.5+ Acked-by: Vivek Goyal Reviewed-by: Ben Hutchings Signed-off-by: Herton Ronaldo Krzesinski Signed-off-by: Jiri Kosina Signed-off-by: Jens Axboe --- drivers/block/floppy.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c index 17c675c52295..83112f08a41d 100644 --- a/drivers/block/floppy.c +++ b/drivers/block/floppy.c @@ -4137,6 +4137,10 @@ static int __init do_floppy_init(void) raw_cmd = NULL; + floppy_wq = alloc_ordered_workqueue("floppy", 0); + if (!floppy_wq) + return -ENOMEM; + for (dr = 0; dr < N_DRIVE; dr++) { disks[dr] = alloc_disk(1); if (!disks[dr]) { @@ -4144,16 +4148,10 @@ static int __init do_floppy_init(void) goto out_put_disk; } - floppy_wq = alloc_ordered_workqueue("floppy", 0); - if (!floppy_wq) { - err = -ENOMEM; - goto out_put_disk; - } - disks[dr]->queue = blk_init_queue(do_fd_request, &floppy_lock); if (!disks[dr]->queue) { err = -ENOMEM; - goto out_destroy_workq; + goto out_put_disk; } blk_queue_max_hw_sectors(disks[dr]->queue, 64); @@ -4317,8 +4315,6 @@ static int __init do_floppy_init(void) out_unreg_region: blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); platform_driver_unregister(&floppy_driver); -out_destroy_workq: - destroy_workqueue(floppy_wq); out_unreg_blkdev: unregister_blkdev(FLOPPY_MAJOR, "fd"); out_put_disk: @@ -4334,6 +4330,7 @@ static int __init do_floppy_init(void) } put_disk(disks[dr]); } + destroy_workqueue(floppy_wq); return err; } -- GitLab