Check for nodev on hashfast driver and disable it if it has disappeared.
diff --git a/driver-hashfast.c b/driver-hashfast.c
index a730159..cae796d 100644
--- a/driver-hashfast.c
+++ b/driver-hashfast.c
@@ -688,6 +688,12 @@ static int64_t hfa_scanwork(struct thr_info *thr)
int64_t hashes;
int jobs, ret;
+ if (unlikely(hashfast->usbinfo.nodev)) {
+ applog(LOG_WARNING, "HFA %d: device disappeared, disabling",
+ hashfast->device_id);
+ return -1;
+ }
+
if (unlikely(thr->work_restart)) {
restart:
ret = hfa_send_frame(hashfast, HF_USB_CMD(OP_WORK_RESTART), 0, (uint8_t *)NULL, 0);