diff options
| author | Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> | 2012-08-27 23:56:51 (GMT) |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2012-10-30 07:34:24 (GMT) |
| commit | b54e1f88897bcacc2cd359f48ea3b39eaf55f084 (patch) | |
| tree | 664c10b93917479b78e11d8e53d77f7a5e9cc440 | |
| parent | 2911758f14e36a7cd5c7367f951dcb8817552f71 (diff) | |
| download | linux-b54e1f88897bcacc2cd359f48ea3b39eaf55f084.tar.xz | |
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 <vgoyal@redhat.com>
Reviewed-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | drivers/block/floppy.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c index 17c675c..83112f0 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 @@ out_release_dma: 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 @@ out_put_disk: } put_disk(disks[dr]); } + destroy_workqueue(floppy_wq); return err; } |