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authorTsutomu Itoh <t-itoh@jp.fujitsu.com>2012-02-16 11:23:58 +0400
committerDavid Sterba <dsterba@suse.cz>2012-02-16 20:23:17 +0400
commit285190d99fef696ec8b0041787387f013cb71d67 (patch)
treed55c5e3f71718cb21f9349280fb160d0403d082d /fs/btrfs/compression.c
parent600a45e1d5e376f679ff9ecc4ce9452710a6d27c (diff)
downloadlinux-285190d99fef696ec8b0041787387f013cb71d67.tar.xz
Btrfs: check return value of lookup_extent_mapping() correctly
This patch corrects error checking of lookup_extent_mapping(). Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Diffstat (limited to 'fs/btrfs/compression.c')
-rw-r--r--fs/btrfs/compression.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 14f1c5a0b2d2..d02c27cd14c7 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -588,6 +588,8 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
page_offset(bio->bi_io_vec->bv_page),
PAGE_CACHE_SIZE);
read_unlock(&em_tree->lock);
+ if (!em)
+ return -EIO;
compressed_len = em->block_len;
cb = kmalloc(compressed_bio_size(root, compressed_len), GFP_NOFS);