From e9238221d3fef990e2fd01702ebe5af90dda52a2 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Wed, 22 Jul 2009 14:44:17 -0400 Subject: [PATCH] USB: dummy-hcd: accept mismatch between wLength and transfer length This patch (as1269) fixes a bug in the way dummy_hcd handles control URBs. Currently it returns a -EOVERFLOW error if the wLength value in the setup packet is different from the URB's transfer_buffer_length. Other host controller drivers don't do this. There's no reason the two length values have to be equal, and in fact they sometimes aren't -- a driver might set the transfer length to the maxpacket value in order to handle buggy devices that don't respect wLength. This patch simply removes the unnecessary check and error return. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/dummy_hcd.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c index a56b24d305f8..5e0966485188 100644 --- a/drivers/usb/gadget/dummy_hcd.c +++ b/drivers/usb/gadget/dummy_hcd.c @@ -1306,11 +1306,6 @@ restart: setup = *(struct usb_ctrlrequest*) urb->setup_packet; w_index = le16_to_cpu(setup.wIndex); w_value = le16_to_cpu(setup.wValue); - if (le16_to_cpu(setup.wLength) != - urb->transfer_buffer_length) { - status = -EOVERFLOW; - goto return_urb; - } /* paranoia, in case of stale queued data */ list_for_each_entry (req, &ep->queue, queue) {