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vfs: clear to the end of the buffer on partial buffer reads

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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>
This commit is contained in:
Dan Carpenter 2012-12-05 20:01:24 +03:00 committed by Linus Torvalds
parent df2fc246c8
commit 27d7c2a006
1 changed files with 1 additions and 1 deletions
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2
fs/buffer.c
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@ -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);