diff --git a/[refs] b/[refs]
index 819825d49de3..cdef8a72fec5 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fabbf2196d0db0b4d175456dcb373aa2440f5728
+refs/heads/master: 40aed5241e4e5363c11acc841f6ef794b2c25668
diff --git a/trunk/drivers/usb/misc/usbtest.c b/trunk/drivers/usb/misc/usbtest.c
index bb078ebb8e81..a35b427c0bac 100644
--- a/trunk/drivers/usb/misc/usbtest.c
+++ b/trunk/drivers/usb/misc/usbtest.c
@@ -1371,6 +1371,8 @@ static void iso_callback(struct urb *urb)
 		ctx->errors += urb->error_count;
 	else if (urb->status != 0)
 		ctx->errors += urb->number_of_packets;
+	else if (urb->actual_length != urb->transfer_buffer_length)
+		ctx->errors++;
 
 	if (urb->status == 0 && ctx->count > (ctx->pending - 1)
 			&& !ctx->submit_error) {