From c0d232d988604b6200b6af1be08f9bb40823ca5d Mon Sep 17 00:00:00 2001
From: Alexander Motin <mav@FreeBSD.org>
Date: Wed, 21 Oct 2009 15:57:16 +0000
Subject: [PATCH] MFp4: Do not search for bus when it is not needed,

---
 sys/cam/cam_xpt.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/sys/cam/cam_xpt.c b/sys/cam/cam_xpt.c
index 39b25dfa97c5..9afeafa3bf5f 100644
--- a/sys/cam/cam_xpt.c
+++ b/sys/cam/cam_xpt.c
@@ -4148,8 +4148,6 @@ xpt_release_simq(struct cam_sim *sim, int run_queue)
 
 		sendq->qfrozen_cnt--;
 		if (sendq->qfrozen_cnt == 0) {
-			struct cam_eb *bus;
-
 			/*
 			 * If there is a timeout scheduled to release this
 			 * sim queue, remove it.  The queue frozen count is
@@ -4159,15 +4157,17 @@ xpt_release_simq(struct cam_sim *sim, int run_queue)
 				callout_stop(&sim->callout);
 				sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
 			}
-			bus = xpt_find_bus(sim->path_id);
 
 			if (run_queue) {
+				struct cam_eb *bus;
+
 				/*
 				 * Now that we are unfrozen run the send queue.
 				 */
+				bus = xpt_find_bus(sim->path_id);
 				xpt_run_dev_sendq(bus);
+				xpt_release_bus(bus);
 			}
-			xpt_release_bus(bus);
 		}
 	}
 }