Index: linux_2_4/drivers/scsi/aic7xxx/aic7xxx.c
diff -u linux_2_4/drivers/scsi/aic7xxx/aic7xxx.c:1.1.1.26 linux_2_4/drivers/scsi/aic7xxx/aic7xxx.c:1.1.1.26.36.1
--- linux_2_4/drivers/scsi/aic7xxx/aic7xxx.c:1.1.1.26	Tue May  8 21:50:17 2001
+++ linux_2_4/drivers/scsi/aic7xxx/aic7xxx.c	Sat May 26 19:35:04 2001
@@ -4837,6 +4837,10 @@
 #if AHC_TARGET_MODE
 		int group;
 
+		if (!scb->io_ctx)
+			BUG();
+		if (!scb->hscb)
+			BUG();
 		group = XPT_FC_GROUP(scb->io_ctx->ccb_h.func_code);
 		if (role == ROLE_INITIATOR) {
 			match = (group != XPT_FC_GROUP_TMODE)
@@ -4848,6 +4852,8 @@
 			       || (tag == SCB_LIST_NULL));
 		}
 #else /* !AHC_TARGET_MODE */
+		if (!scb->hscb)
+			BUG();
 		match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL));
 #endif /* AHC_TARGET_MODE */
 	}