Jun 08 2012

fs/direct-io.c: adjust suspicious bit operation 

Author: Julia Lawall <Julia.Lawall@lip6.fr>

READ is 0, so the result of the bit-and operation is 0.  Rewrite with == as
done elsewhere in the same file.

This problem was found using Coccinelle (http://coccinelle.lip6.fr/).

Signed-off-by: Julia Lawall 
Reviewed-by: Jeff Moyer 
Cc: Al Viro 
Signed-off-by: Andrew Morton 
Signed-off-by: Al Viro 

---
 fs/direct-io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 0c85fae..1faf4cb 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1258,7 +1258,7 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 	 */
 	BUG_ON(retval == -EIOCBQUEUED);
 	if (dio->is_async && retval == 0 && dio->result &&
-	    ((rw & READ) || (dio->result == sdio.size)))
+	    ((rw == READ) || (dio->result == sdio.size)))
 		retval = -EIOCBQUEUED;
 
 	if (retval != -EIOCBQUEUED)

qlambert