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unregister_blkdev(): do WARN_ON on failure 

When unregister_blkdev() has failed, something wrong happened.  This patch
adds WARN_ON to notify of such badness.

Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Akinobu Mita 2007-07-17 04:03:45 -07:00 committed by Linus Torvalds
parent 62239ac2b3
commit 294462a5c6
1 changed files with 3 additions and 2 deletions
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5
block/genhd.c
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@ -120,9 +120,10 @@ int unregister_blkdev(unsigned int major, const char *name)
for (n = &major_names[index]; *n; n = &(*n)->next)
if ((*n)->major == major)
break;
if (!*n || strcmp((*n)->name, name))
if (!*n || strcmp((*n)->name, name)) {
WARN_ON(1);
ret = -EINVAL;
else {
} else {
p = *n;
*n = p->next;
}