From 807855890b5088ffe6569e426e964d11935c9ae6 Mon Sep 17 00:00:00 2001
From: markj <markj@FreeBSD.org>
Date: Mon, 8 Jan 2018 15:41:49 +0000
Subject: [PATCH] Release the queue lock before restarting the worker loop.

Reported and tested by:	pho
MFC after:	3 days
Sponsored by:	Dell EMC Isilon
---
 sys/geom/mirror/g_mirror.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/geom/mirror/g_mirror.c b/sys/geom/mirror/g_mirror.c
index 0c5e45be5acd..f9c8952b0949 100644
--- a/sys/geom/mirror/g_mirror.c
+++ b/sys/geom/mirror/g_mirror.c
@@ -1964,8 +1964,10 @@ g_mirror_worker(void *arg)
 					continue;
 				}
 			}
-			if (g_mirror_event_first(sc) != NULL)
+			if (g_mirror_event_first(sc) != NULL) {
+				mtx_unlock(&sc->sc_queue_mtx);
 				continue;
+			}
 			sx_xunlock(&sc->sc_lock);
 			MSLEEP(sc, &sc->sc_queue_mtx, PRIBIO | PDROP, "m:w1",
 			    timeout * hz);