GFS2: Fix gfs2_xattr_acl_chmod()

The ref counting for the bh returned by gfs2_ea_find() was
wrong. This patch ensures that we always drop the ref count
to that bh correctly.

Signed-off-by: Steven Whitehouse <[email protected]>

fs/gfs2/xattr.c

@@ -1296,6 +1296,7 @@ static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
 
 int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
 {
+	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 	struct gfs2_ea_location el;
 	struct buffer_head *dibh;
 	int error;
@@ -1305,16 +1306,17 @@ int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
 		return error;
 
 	if (GFS2_EA_IS_STUFFED(el.el_ea)) {
-		error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
-		if (error)
-			return error;
-
-		gfs2_trans_add_bh(ip->i_gl, el.el_bh, 1);
-		memcpy(GFS2_EA2DATA(el.el_ea), data,
-		       GFS2_EA_DATA_LEN(el.el_ea));
-	} else
+		error = gfs2_trans_begin(sdp, RES_DINODE + RES_EATTR, 0);
+		if (error == 0) {
+			gfs2_trans_add_bh(ip->i_gl, el.el_bh, 1);
+			memcpy(GFS2_EA2DATA(el.el_ea), data,
+			       GFS2_EA_DATA_LEN(el.el_ea));
+		}
+	} else {
 		error = ea_acl_chmod_unstuffed(ip, el.el_ea, data);
+	}
 
+	brelse(el.el_bh);
 	if (error)
 		return error;
 
@@ -1327,8 +1329,7 @@ int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
 		brelse(dibh);
 	}
 
-	gfs2_trans_end(GFS2_SB(&ip->i_inode));
-
+	gfs2_trans_end(sdp);
 	return error;
 }