qnx4: i_sb is never NULL

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/qnx4/namei.c b/fs/qnx4/namei.c
index d024505..e62c818 100644
--- a/fs/qnx4/namei.c
+++ b/fs/qnx4/namei.c
@@ -60,10 +60,6 @@
 	struct buffer_head *bh;
 
 	*res_dir = NULL;
-	if (!dir->i_sb) {
-		printk(KERN_WARNING "qnx4: no superblock on dir.\n");
-		return NULL;
-	}
 	bh = NULL;
 	block = offset = blkofs = 0;
 	while (blkofs * QNX4_BLOCK_SIZE + offset < dir->i_size) {