diff --git a/sys/dev/mrsas/mrsas.c b/sys/dev/mrsas/mrsas.c
--- a/sys/dev/mrsas/mrsas.c
+++ b/sys/dev/mrsas/mrsas.c
@@ -3980,6 +3980,7 @@
 			}
 		}
 	}
+	sc->chan = NULL;
 
 	if (cmd->cmd_status == 0xFF) {
 		device_printf(sc->mrsas_dev, "DCMD timed out after %d "