[XFS] Invalidate quotacheck when mounting without a quota type.

When quotas are mounted or remounted without a particular quota type the
quota accounting for that type becomes invalid. Previously we were
ignoring this leading to accounting errors.

SGI-PV: 961964
SGI-Modid: xfs-linux-melb:xfs-kern:28225a

Signed-off-by: Donald Douwsma <donaldd@sgi.com>
Signed-off-by: Utako Kusaka <utako@tnes.nec.co.jp>
Signed-off-by: Vlad Apostolov <vapo@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

fs/xfs/quota/xfs_qm.c

@@ -388,6 +388,17 @@ xfs_qm_mount_quotas(
 			return XFS_ERROR(error);
 		}
 	}
+	/* 
+	 * If one type of quotas is off, then it will lose its
+	 * quotachecked status, since we won't be doing accounting for
+	 * that type anymore.
+	 */
+	if (!XFS_IS_UQUOTA_ON(mp)) {
+		mp->m_qflags &= ~XFS_UQUOTA_CHKD;
+	}
+	if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp))) {
+		mp->m_qflags &= ~XFS_OQUOTA_CHKD;
+	}
 
  write_changes:
 	/*