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btrfs: fix uncheck memory allocation in btrfs_submit_compressed_read

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btrfs_submit_compressed_read() is lack of memory allocation checks and
corresponding error route.

After this fix, if it comes to "no memory" case, errno will be returned
to userland step by step, and tell users this operation cannot go on.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
liubo
2011-01-26 06:21:39 +00:00
committed by Chris Mason
parent eab49bec41
commit 6b82ce8d82
2 changed files with 25 additions and 4 deletions
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4
fs/btrfs/extent_io.c
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@@ -1865,7 +1865,7 @@ static int submit_one_bio(int rw, struct bio *bio, int mirror_num,
bio_get(bio);
if (tree->ops && tree->ops->submit_bio_hook)
tree->ops->submit_bio_hook(page->mapping->host, rw, bio,
ret = tree->ops->submit_bio_hook(page->mapping->host, rw, bio,
mirror_num, bio_flags, start);
else
submit_bio(rw, bio);
@@ -2126,7 +2126,7 @@ int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
ret = __extent_read_full_page(tree, page, get_extent, &bio, 0,
&bio_flags);
if (bio)
submit_one_bio(READ, bio, 0, bio_flags);
ret = submit_one_bio(READ, bio, 0, bio_flags);
return ret;
}