Only reset an avalon device with no results when there are no results consecutively.

driver-avalon.c

@@ -929,13 +929,18 @@ static int64_t avalon_scanhash(struct thr_info *thr)
 			       elapsed.tv_sec, elapsed.tv_usec);
 		}
 	}
-	if (unlikely(result_wrong >= avalon_get_work_count ||
-	    (hash_count == 0 && ret != AVA_GETS_RESTART))) {
-		/* This means FPGA controller gave all wrong results, so
-		 * try to reset the Avalon */
+	if (hash_count) {
+		if (avalon->results < AVALON_ARRAY_SIZE)
+			avalon->results++;
+	} else if (unlikely((result_wrong >= avalon_get_work_count ) ||
+		   (ret != AVA_GETS_RESTART && --avalon->results < 0))) {
+			/* Look for all invalid results, or consecutive failure
+			 * to generate any results suggesting the FPGA
+			 * controller has screwed up. */
 			do_avalon_close(thr);
 			applog(LOG_ERR,
-		       "AVA%i: FPGA controller mess up, %d wrong results", avalon->device_id, result_wrong);
+			       "AVA%i: FPGA controller messed up, %d wrong results",
+			       avalon->device_id, result_wrong);
 			dev_error(avalon, REASON_DEV_COMMS_ERROR);
 			sleep(1);
 			avalon_init(avalon);

miner.h

@@ -431,6 +431,7 @@ struct cgpu_info {
 	struct work **works;
 	int work_array;
 	int queued;
+	int results;
 #endif
 #ifdef USE_USBUTILS
 	struct cg_usb_info usbinfo;