From f4508b6a34051fd466d1508698a62c9eba9c555b Mon Sep 17 00:00:00 2001
From: Con Kolivas <kernel@kolivas.org>
Date: Thu, 20 Jun 2013 23:57:58 +1000
Subject: [PATCH] Temporarily limit usb transfer sizes to 512 till we provide a
 way for each driver to choose the upper limit.

---
 usbutils.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/usbutils.c b/usbutils.c
index c6f5aeb0..91c475b6 100644
--- a/usbutils.c
+++ b/usbutils.c
@@ -2186,8 +2186,12 @@ usb_bulk_transfer(struct libusb_device_handle *dev_handle,
 
 	/* Limit length of transfer to the largest this descriptor supports
 	 * and leave the higher level functions to transfer more if needed. */
+#if 0
 	if (length > cgpu->usbdev->found->wMaxPacketSize)
 		length = cgpu->usbdev->found->wMaxPacketSize;
+#endif
+	if (length > 512)
+		length = 512;
 
 	cg_rlock(&cgusb_fd_lock);
 	err = libusb_bulk_transfer(dev_handle, endpoint, data, length,