[PATCH] direct IO write memory leak fix

It seems that O_DIRECT write sometimes leaks memory.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/direct-io.c

@@ -844,8 +844,10 @@ static int do_direct_IO(struct dio *dio)
 				char *kaddr;
 
 				/* AKPM: eargh, -ENOTBLK is a hack */
-				if (dio->rw == WRITE)
+				if (dio->rw == WRITE) {
+					page_cache_release(page);
 					return -ENOTBLK;
+				}
 
 				if (dio->block_in_file >=
 					i_size_read(dio->inode)>>blkbits) {