diff --git a/fs/sdcardfs/lookup.c b/fs/sdcardfs/lookup.c
index 19154b77b0fc..78c44ed70bf2 100644
--- a/fs/sdcardfs/lookup.c
+++ b/fs/sdcardfs/lookup.c
@@ -366,8 +366,13 @@ put_name:
 	/* instatiate a new negative dentry */
 	dname.name = name->name;
 	dname.len = name->len;
-	dname.hash = full_name_hash(lower_dir_dentry, dname.name, dname.len);
-	lower_dentry = d_lookup(lower_dir_dentry, &dname);
+
+	/* See if the low-level filesystem might want
+	 * to use its own hash
+	 */
+	lower_dentry = d_hash_and_lookup(lower_dir_dentry, &dname);
+	if (IS_ERR(lower_dentry))
+		return lower_dentry;
 	if (lower_dentry)
 		goto setup_lower;