diff --git a/driver-bflsc.c b/driver-bflsc.c
index 1f813e94..9177d57c 100644
--- a/driver-bflsc.c
+++ b/driver-bflsc.c
@@ -565,25 +565,6 @@ static bool bflsc_qres(struct cgpu_info *bflsc, char *buf, size_t bufsiz, int de
 	return readok;
 }
 
-static void __set_latency(struct cgpu_info *bflsc)
-{
-	int err;
-
-	if (bflsc->usbinfo.nodev)
-		return;
-
-	// Latency
-	err = usb_transfer(bflsc, FTDI_TYPE_OUT, FTDI_REQUEST_LATENCY,
-				bflsc->usbdev->found->latency,
-				bflsc->usbdev->found->interface, C_LATENCY);
-
-	applog(LOG_DEBUG, "%s%i: latency got err %d",
-		bflsc->drv->name, bflsc->device_id, err);
-
-	if (bflsc->usbinfo.nodev)
-		return;
-}
-
 static void __bflsc_initialise(struct cgpu_info *bflsc)
 {
 	int err;
@@ -604,7 +585,7 @@ static void __bflsc_initialise(struct cgpu_info *bflsc)
 	if (bflsc->usbinfo.nodev)
 		return;
 
-	__set_latency(bflsc);
+	usb_ftdi_set_latency(bflsc);
 
 	if (bflsc->usbinfo.nodev)
 		return;
@@ -944,7 +925,7 @@ reinit:
 
 	if (latency != bflsc->usbdev->found->latency) {
 		bflsc->usbdev->found->latency = latency;
-		__set_latency(bflsc);
+		usb_ftdi_set_latency(bflsc);
 	}
 
 	for (i = 0; i < sc_info->sc_count; i++)
diff --git a/driver-icarus.c b/driver-icarus.c
index d782a71e..f4d50cb3 100644
--- a/driver-icarus.c
+++ b/driver-icarus.c
@@ -256,10 +256,6 @@ static void icarus_initialise(struct cgpu_info *icarus, int baud)
 		case IDENT_LLT:
 		case IDENT_CMR1:
 		case IDENT_CMR2:
-			if (icarus->usbdev->found->latency == LATENCY_UNUSED)
-				quit(1, "%s: cgid %d invalid latency (UNUSED)",
-					icarus->drv->name, icarus->cgminer_id);
-
 			// Reset
 			transfer(icarus, FTDI_TYPE_OUT, FTDI_REQUEST_RESET, FTDI_VALUE_RESET,
 				 icarus->usbdev->found->interface, C_RESET);
@@ -268,9 +264,7 @@ static void icarus_initialise(struct cgpu_info *icarus, int baud)
 				return;
 
 			// Latency
-			transfer(icarus, FTDI_TYPE_OUT, FTDI_REQUEST_LATENCY,
-				 icarus->usbdev->found->latency,
-				 icarus->usbdev->found->interface, C_LATENCY);
+			usb_ftdi_set_latency(icarus);
 
 			if (icarus->usbinfo.nodev)
 				return;