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drbd: Null pointer deref fix to the large "multi bio rewrite"

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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Philipp Reisner 2010-05-20 13:35:31 +02:00 committed by Jens Axboe
parent fc8ce1941d
commit 23ce422748
1 changed files with 4 additions and 0 deletions
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4
drivers/block/drbd/drbd_receiver.c
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@ -98,6 +98,10 @@ static struct page *page_chain_del(struct page **head, int n)
BUG_ON(!head);
page = *head;
if (!page)
return NULL;
while (page) {
tmp = page_chain_next(page);
if (--n == 0)