diff --git a/sys/dev/aic7xxx/aic79xx_osm.c b/sys/dev/aic7xxx/aic79xx_osm.c
--- a/sys/dev/aic7xxx/aic79xx_osm.c
+++ b/sys/dev/aic7xxx/aic79xx_osm.c
@@ -267,6 +267,7 @@
 		goto fail;
 	}
 		
+	memset(&csa, 0, sizeof(csa));
 	xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
 	csa.ccb_h.func_code = XPT_SASYNC_CB;
 	csa.event_enable = AC_LOST_DEVICE;
diff --git a/sys/dev/aic7xxx/aic7xxx_osm.c b/sys/dev/aic7xxx/aic7xxx_osm.c
--- a/sys/dev/aic7xxx/aic7xxx_osm.c
+++ b/sys/dev/aic7xxx/aic7xxx_osm.c
@@ -215,6 +215,7 @@
 		goto fail;
 	}
 		
+	memset(&csa, 0, sizeof(csa));
 	xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
 	csa.ccb_h.func_code = XPT_SASYNC_CB;
 	csa.event_enable = AC_LOST_DEVICE;
diff --git a/sys/dev/hpt27xx/hpt27xx_osm_bsd.c b/sys/dev/hpt27xx/hpt27xx_osm_bsd.c
--- a/sys/dev/hpt27xx/hpt27xx_osm_bsd.c
+++ b/sys/dev/hpt27xx/hpt27xx_osm_bsd.c
@@ -1252,6 +1252,7 @@
 			return ;
 		}
 
+		memset(&ccb, 0, sizeof(ccb));
 		xpt_setup_ccb(&ccb.ccb_h, vbus_ext->path, /*priority*/5);
 		ccb.ccb_h.func_code = XPT_SASYNC_CB;
 		ccb.event_enable = AC_LOST_DEVICE;
diff --git a/sys/dev/hptiop/hptiop.c b/sys/dev/hptiop/hptiop.c
--- a/sys/dev/hptiop/hptiop.c
+++ b/sys/dev/hptiop/hptiop.c
@@ -2046,6 +2046,7 @@
 		goto free_hba_path;
 	}
 
+	memset(&ccb, 0, sizeof(ccb));
 	xpt_setup_ccb(&ccb.ccb_h, hba->path, /*priority*/5);
 	ccb.ccb_h.func_code = XPT_SASYNC_CB;
 	ccb.event_enable = (AC_FOUND_DEVICE | AC_LOST_DEVICE);
@@ -2797,6 +2798,7 @@
 	if (hba->path) {
 		struct ccb_setasync ccb;
 
+		memset(&ccb, 0, sizeof(ccb));
 		xpt_setup_ccb(&ccb.ccb_h, hba->path, /*priority*/5);
 		ccb.ccb_h.func_code = XPT_SASYNC_CB;
 		ccb.event_enable = 0;
diff --git a/sys/dev/hptnr/hptnr_osm_bsd.c b/sys/dev/hptnr/hptnr_osm_bsd.c
--- a/sys/dev/hptnr/hptnr_osm_bsd.c
+++ b/sys/dev/hptnr/hptnr_osm_bsd.c
@@ -1438,6 +1438,7 @@
 		}
 		hpt_unlock_vbus(vbus_ext);
 
+		memset(&ccb, 0, sizeof(ccb));
 		xpt_setup_ccb(&ccb.ccb_h, vbus_ext->path, /*priority*/5);
 		ccb.ccb_h.func_code = XPT_SASYNC_CB;
 		ccb.event_enable = AC_LOST_DEVICE;
diff --git a/sys/dev/hptrr/hptrr_osm_bsd.c b/sys/dev/hptrr/hptrr_osm_bsd.c
--- a/sys/dev/hptrr/hptrr_osm_bsd.c
+++ b/sys/dev/hptrr/hptrr_osm_bsd.c
@@ -1086,6 +1086,7 @@
 		}
 		hpt_unlock_vbus(vbus_ext);
 
+		memset(&ccb, 0, sizeof(ccb));
 		xpt_setup_ccb(&ccb.ccb_h, vbus_ext->path, /*priority*/5);
 		ccb.ccb_h.func_code = XPT_SASYNC_CB;
 		ccb.event_enable = AC_LOST_DEVICE;
diff --git a/sys/powerpc/ps3/ps3cdrom.c b/sys/powerpc/ps3/ps3cdrom.c
--- a/sys/powerpc/ps3/ps3cdrom.c
+++ b/sys/powerpc/ps3/ps3cdrom.c
@@ -262,6 +262,7 @@
 		goto fail_unregister_xpt_bus;
 	}
 
+	memset(&csa, 0, sizeof(csa));
 	xpt_setup_ccb(&csa.ccb_h, sc->sc_path, 5);
 	csa.ccb_h.func_code = XPT_SASYNC_CB;
 	csa.event_enable = AC_LOST_DEVICE;