From 91405151eb7005949072bee751343390757f8417 Mon Sep 17 00:00:00 2001 From: Filipe Manana Date: Thu, 5 Jun 2014 13:22:24 +0100 Subject: Btrfs: make sure we retry if we couldn't get the page In inode.c:btrfs_page_exists_in_range(), if we can't get the page we need to retry. However we weren't retrying because we weren't setting page to NULL, which makes the while loop exit immediately and will make us call page_cache_release after exiting the loop which is incorrect because our page get didn't succeed. This could also make us return true when we shouldn't. Signed-off-by: Filipe David Borba Manana Signed-off-by: Chris Mason --- fs/btrfs/inode.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'fs') diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 38d1e7b976d8..cdbd20e62bb6 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -6777,8 +6777,10 @@ bool btrfs_page_exists_in_range(struct inode *inode, loff_t start, loff_t end) break; /* TODO: Is this relevant for this use case? */ } - if (!page_cache_get_speculative(page)) + if (!page_cache_get_speculative(page)) { + page = NULL; continue; + } /* * Has the page moved? -- cgit v1.2.3