GFS2: fix regression in dir_double_exhash

Recent commit e8830d88 introduced a bug in function dir_double_exhash;
it was failing to set h in the fall-back case. This patch corrects it.
Signed-off-by: NBob Peterson <rpeterso@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

fs/gfs2/dir.c

@@ -1125,13 +1125,14 @@ static int dir_double_exhash(struct gfs2_inode *dip)
 	if (IS_ERR(hc))
 		return PTR_ERR(hc);
 
-	h = hc2 = kmalloc(hsize_bytes * 2, GFP_NOFS | __GFP_NOWARN);
+	hc2 = kmalloc(hsize_bytes * 2, GFP_NOFS | __GFP_NOWARN);
 	if (hc2 == NULL)
 		hc2 = __vmalloc(hsize_bytes * 2, GFP_NOFS, PAGE_KERNEL);
 
 	if (!hc2)
 		return -ENOMEM;
 
+	h = hc2;
 	error = gfs2_meta_inode_buffer(dip, &dibh);
 	if (error)
 		goto out_kfree;