Skip to content
Permalink
Browse files

paride/pf: cleanup queues when detection fails

The driver allocates queues for all the units it potentially
supports. But if we fail to detect any drives, then we fail
loading the module without cleaning up those queues. This is
now evident with the switch to blk-mq, though the bug has
been there forever as far as I can tell.

Also fix cleanup through regular module exit.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
  • Loading branch information...
axboe committed Mar 18, 2019
1 parent 9e98c67 commit 6ce59025f1182125e75c8d121daf44056b65dd1f
Showing with 11 additions and 5 deletions.
  1. +11 −5 drivers/block/paride/pf.c
@@ -761,8 +761,12 @@ static int pf_detect(void)
return 0;

printk("%s: No ATAPI disk detected\n", name);
for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++)
for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {
blk_cleanup_queue(pf->disk->queue);
pf->disk->queue = NULL;
blk_mq_free_tag_set(&pf->tag_set);
put_disk(pf->disk);
}
pi_unregister_driver(par_drv);
return -1;
}
@@ -1047,13 +1051,15 @@ static void __exit pf_exit(void)
int unit;
unregister_blkdev(major, name);
for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {
if (!pf->present)
continue;
del_gendisk(pf->disk);
if (pf->present)
del_gendisk(pf->disk);

blk_cleanup_queue(pf->disk->queue);
blk_mq_free_tag_set(&pf->tag_set);
put_disk(pf->disk);
pi_release(pf->pi);

if (pf->present)
pi_release(pf->pi);
}
}

0 comments on commit 6ce5902

Please sign in to comment.
You can’t perform that action at this time.