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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>
This commit is contained in:
Herton Ronaldo Krzesinski 2012-08-27 20:56:51 -03:00 committed by Jens Axboe
parent 2911758f14
commit b54e1f8889
1 changed files with 6 additions and 9 deletions
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15
drivers/block/floppy.c
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@ -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;
}