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ataflop: fix error handling during setup 

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>
This commit is contained in:
Omar Sandoval 2018-10-11 12:20:49 -07:00 committed by Jens Axboe
parent 3e6b8c3c4b
commit 71327f547e
1 changed files with 15 additions and 10 deletions
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25
drivers/block/ataflop.c
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@ -2014,6 +2014,11 @@ static int __init atari_floppy_init (void)
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)
@ -2045,10 +2050,6 @@ static int __init atari_floppy_init (void)
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);
}
@ -2063,13 +2064,17 @@ static int __init atari_floppy_init (void)
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;