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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>
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@ -120,9 +120,10 @@ int unregister_blkdev(unsigned int major, const char *name)
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for (n = &major_names[index]; *n; n = &(*n)->next)
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if ((*n)->major == major)
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break;
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if (!*n || strcmp((*n)->name, name))
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if (!*n || strcmp((*n)->name, name)) {
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WARN_ON(1);
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ret = -EINVAL;
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else {
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} else {
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p = *n;
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*n = p->next;
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}
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