dm raid: clean up four equivalent goto tags in raid_ctr()

There are four equivalent goto tags in raid_ctr(), clean them up to
use just one.

There is no functional change and this is preparation to fix
raid_ctr()'s unprotected md_stop().

Signed-off-by: Yu Kuai <[e-mail]>
Signed-off-by: Mike Snitzer <[e-mail]>

drivers/md/dm-raid.c

···
 	r = md_start(&rs->md);
 	if (r) {
 		ti->error = "Failed to start raid array";
-		mddev_unlock(&rs->md);
-		goto bad_md_start;
+		goto bad_unlock;
 	}
 
 	/* If raid4/5/6 journal mode explicitly requested (only possible with journal dev) -> set it */
···
 		r = r5c_journal_mode_set(&rs->md, rs->journal_dev.mode);
 		if (r) {
 			ti->error = "Failed to set raid4/5/6 journal mode";
-			mddev_unlock(&rs->md);
-			goto bad_journal_mode_set;
+			goto bad_unlock;
 		}
 	}
 
···
 	/* Try to adjust the raid4/5/6 stripe cache size to the stripe size */
 	if (rs_is_raid456(rs)) {
 		r = rs_set_raid456_stripe_cache(rs);
-		if (r) {
-			mddev_unlock(&rs->md);
-			goto bad_stripe_cache;
-		}
+		if (r)
+			goto bad_unlock;
 	}
 
 	/* Now do an early reshape check */
 	if (test_bit(RT_FLAG_RESHAPE_RS, &rs->runtime_flags)) {
 		r = rs_check_reshape(rs);
-		if (r) {
-			mddev_unlock(&rs->md);
-			goto bad_check_reshape;
-		}
+		if (r)
+			goto bad_unlock;
 
 		/* Restore new, ctr requested layout to perform check */
 		rs_config_restore(rs, &rs_layout);
···
 			r = rs->md.pers->check_reshape(&rs->md);
 			if (r) {
 				ti->error = "Reshape check failed";
-				mddev_unlock(&rs->md);
-				goto bad_check_reshape;
+				goto bad_unlock;
 			}
 		}
 	}
···
 	mddev_unlock(&rs->md);
 	return 0;
 
-bad_md_start:
-bad_journal_mode_set:
-bad_stripe_cache:
-bad_check_reshape:
+bad_unlock:
+	mddev_unlock(&rs->md);
 	md_stop(&rs->md);
 bad:
 	raid_set_free(rs);