gfs2: Fix logd wakeup on I/O error

When quotad detects an I/O error, it sets sd_log_error and then it wakes
up logd to withdraw the filesystem.  However, logd doesn't wake up when
sd_log_error is set.  Fix that.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

fs/gfs2/log.c

@@ -1340,6 +1340,7 @@ int gfs2_logd(void *data)
 				test_bit(SDF_FORCE_AIL_FLUSH, &sdp->sd_flags) ||
 				gfs2_ail_flush_reqd(sdp) ||
 				gfs2_jrnl_flush_reqd(sdp) ||
+				sdp->sd_log_error ||
 				kthread_should_stop(),
 				t);
 	}