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Commit 35fcca44 authored by David Brownell's avatar David Brownell Committed by Greg Kroah-Hartman
Browse files

[PATCH] USB: gadget zero poisons OUT buffers 



Fill OUT buffers with 0x55 before RX, so that controller driver
bugs that mangle data can be more readily detected during testing.

Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 98416333

drivers/usb/gadget/zero.c

+5 −2
Original line number Original line Diff line number Diff line
@@ -572,9 +572,10 @@ static void source_sink_complete (struct usb_ep *ep, struct usb_request *req) 
	switch (status) {

	switch (status) {





	case 0: 			/* normal completion? */

	case 0: 			/* normal completion? */

		if (ep == dev->out_ep)

		if (ep == dev->out_ep) {

			check_read_data (dev, ep, req);

			check_read_data (dev, ep, req);

		else

			memset (req->buf, 0x55, req->length);

		} else

			reinit_write_data (dev, ep, req);

			reinit_write_data (dev, ep, req);

		break;

		break;
@@ -626,6 +627,8 @@ source_sink_start_ep (struct usb_ep *ep, gfp_t gfp_flags) 




	if (strcmp (ep->name, EP_IN_NAME) == 0)

	if (strcmp (ep->name, EP_IN_NAME) == 0)

		reinit_write_data (ep->driver_data, ep, req);

		reinit_write_data (ep->driver_data, ep, req);

	else

		memset (req->buf, 0x55, req->length);





	status = usb_ep_queue (ep, req, gfp_flags);

	status = usb_ep_queue (ep, req, gfp_flags);

	if (status) {

	if (status) {