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authorDan Carpenter <dan.carpenter@oracle.com>2012-12-05 20:01:24 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-05 10:32:59 -0800
commit27d7c2a006a81c04fab00b8cd81b99af3b32738d (patch)
treed04b7860b79d70b5c1ebedc964ffa1cc8fee261e /fs/buffer.c
parentdf2fc246c8ee8b6067af1fa55d3bc23107457f61 (diff)
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vfs: clear to the end of the buffer on partial buffer reads
READ is zero so the "rw & READ" test is always false. The intended test was "((rw & RW_MASK) == READ)". Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/buffer.c')
-rw-r--r--fs/buffer.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index c4e11390a44c..ec0aca8ba6bf 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2935,7 +2935,7 @@ static void guard_bh_eod(int rw, struct bio *bio, struct buffer_head *bh)
bio->bi_io_vec[0].bv_len = bytes;
/* ..and clear the end of the buffer for reads */
- if (rw & READ) {
+ if ((rw & RW_MASK) == READ) {
void *kaddr = kmap_atomic(bh->b_page);
memset(kaddr + bh_offset(bh) + bytes, 0, bh->b_size - bytes);
kunmap_atomic(kaddr);