--- linux-2.4.18-orig/drivers/scsi/aic7xxx/aic7xxx.c	Thu Oct 25 16:53:48 2001
+++ linux-2.4.18/drivers/scsi/aic7xxx/aic7xxx.c	Wed Oct  2 11:42:57 2002
@@ -1073,6 +1073,15 @@
 				ahc_outb(ahc, MSG_OUT, mesg_out);
 		}
 		/*
+		 * If a disk is hot-added, it sometimes gets here with a
+		 * scsi parity error in data-in, and could hang, so we
+		 * need to clear the error and rescan to correctly
+		 * add the disk, so this would clear it:
+		 * if (errorphase  == P_DATAIN || errorphase  == P_DATAIN_DT)
+		 *     ahc_reset_channel(ahc, intr_channel,FALSE);
+		 * But it is less harsh to do the renegotiation below.
+		 */
+		/*
 		 * Force a renegotiation with this target just in
 		 * case we are out of sync for some external reason
 		 * unknown (or unreported) by the target.
--- linux-2.4.18-orig/drivers/scsi/aic7xxx/aic7xxx_linux.c	Mon Feb 25 14:38:04 2002
+++ linux-2.4.18/drivers/scsi/aic7xxx/aic7xxx_linux.c	Wed Oct  2 11:42:57 2002
@@ -1973,6 +1973,9 @@
         case AC_SENT_BDR:
 		break;
         case AC_BUS_RESET:
+		printf(KERN_INFO "(scsi%d:%d:0:0) bus_reset, code=%x\n",
+			ahc->platform_data->host->host_no,
+			channel - 'A',  code);
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
 		if (ahc->platform_data->host != NULL) {
 			scsi_report_bus_reset(ahc->platform_data->host,
@@ -1981,7 +1984,10 @@
 #endif
                 break;
         default:
-                panic("ahc_send_async: Unexpected async event");
+		panic("ahc_send_async: Unexpected async event, "
+			"code=%x, host=%x, channel=%x, target=%x\n",
+			code, ahc->platform_data->host->host_no,
+			channel - 'A', target);
         }
 }
 
@@ -2008,7 +2014,7 @@
 	if ((scb->flags & SCB_ACTIVE) == 0) {
 		printf("SCB %d done'd twice\n", scb->hscb->tag);
 		ahc_dump_card_state(ahc);
-		panic("Stopping for safety");
+		panic("SCB %d done'd twice, stopping.",scb->hscb->tag);
 	}
 	cmd = scb->io_ctx;
 	dev = scb->platform_data->dev;
@@ -2332,8 +2338,11 @@
 		break;
 	}
 	default:
-		panic("ahc_linux_filter_command: Unexpected Command type  %x\n",
-		      cmd->cmnd[0]);
+		/*
+		 * Unexpected command, dont panic, just log & ignore it.
+		 */
+		printf(KERN_ERR "ahc_linux_filter_command: Unexpected Command type %x\n",
+			cmd->cmnd[0]);
 		break;
 	}
 }