diff options
| author | Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> | 2012-08-27 20:56:51 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-05 09:56:49 +0100 |
| commit | 0de4380ecfc63f6f3940b9ec03c36c78f008ac12 (patch) | |
| tree | fca0668e3f684a82ee381a1ec4fa0b5f534ee378 | |
| parent | 636b755668eefd3537af58e7843ef8389c4d03b6 (diff) | |
floppy: don't call alloc_ordered_workqueue inside the alloc_disk loop
commit b54e1f88897bcacc2cd359f48ea3b39eaf55f084 upstream.
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.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 a7d6347aaa79..c8d9e68a732e 100644 --- a/drivers/block/floppy.c +++ b/drivers/block/floppy.c @@ -4138,6 +4138,10 @@ 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]) { @@ -4145,16 +4149,10 @@ 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); @@ -4318,8 +4316,6 @@ 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: @@ -4335,6 +4331,7 @@ out_put_disk: } put_disk(disks[dr]); } + destroy_workqueue(floppy_wq); return err; } |