From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Wed, 4 May 2011 14:18:50 +0000 (+0200)
Subject: Btrfs: fix extent state leak on failed nodatasum reads
X-Git-Tag: upstream/snapshot3+hdmi~9699^2~18
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=08d2f347e877e489ca098c87a6fd2e872fef9767;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

Btrfs: fix extent state leak on failed nodatasum reads

When encountering an EIO while reading from a nodatasum extent, we
insert an error record into the inode's failure tree.
btrfs_readpage_end_io_hook returns early for nodatasum inodes. We'd
better clear the failure tree in that case, otherwise the kernel
complains about

	BUG extent_state: Objects remaining on kmem_cache_close()

on rmmod.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 02ff4a1..113913a 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1986,7 +1986,7 @@ static int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end,
 	}
 
 	if (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)
-		return 0;
+		goto good;
 
 	if (root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID &&
 	    test_range_bit(io_tree, start, end, EXTENT_NODATASUM, 1, NULL)) {