From b5dfb8f03ef6b647bea244db8307a33f16ee5ea2 Mon Sep 17 00:00:00 2001
From: Con Kolivas <kernel@kolivas.org>
Date: Sun, 3 Nov 2013 20:15:41 +1100
Subject: [PATCH] Ignore preferred packet size.

---
 usbutils.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/usbutils.c b/usbutils.c
index 583a7660..fa18523d 100644
--- a/usbutils.c
+++ b/usbutils.c
@@ -2418,7 +2418,6 @@ usb_bulk_transfer(struct libusb_device_handle *dev_handle, int intinfo,
 	struct usb_epinfo *usb_epinfo;
 	struct usb_transfer ut;
 	unsigned char endpoint;
-	uint16_t MaxPacketSize;
 	int err, errn;
 #if DO_USB_STATS
 	struct timeval tv_start, tv_finish;
@@ -2442,14 +2441,8 @@ usb_bulk_transfer(struct libusb_device_handle *dev_handle, int intinfo,
 	if (unlikely(cgpu->shutdown))
 		return libusb_bulk_transfer(dev_handle, endpoint, data, length, transferred, timeout);
 
-	/* Limit length of transfer to the largest this descriptor supports
-	 * and leave the higher level functions to transfer more if needed. */
-	if (usb_epinfo->PrefPacketSize)
-		MaxPacketSize = usb_epinfo->PrefPacketSize;
-	else
-		MaxPacketSize = usb_epinfo->wMaxPacketSize;
-	if (length > MaxPacketSize)
-		length = MaxPacketSize;
+	if (length > usb_epinfo->wMaxPacketSize)
+		length = usb_epinfo->wMaxPacketSize;
 	if ((endpoint & LIBUSB_ENDPOINT_DIR_MASK) == LIBUSB_ENDPOINT_OUT)
 		memcpy(buf, data, length);