From 35fcca442aca1a8d927b697e7e15d3f655958bd7 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Sun, 2 Apr 2006 10:19:43 -0800 Subject: [PATCH] [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: David Brownell Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/zero.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c index 51424f66a765..68e3d8f5da89 100644 --- a/drivers/usb/gadget/zero.c +++ b/drivers/usb/gadget/zero.c @@ -572,9 +572,10 @@ static void source_sink_complete (struct usb_ep *ep, struct usb_request *req) switch (status) { case 0: /* normal completion? */ - if (ep == dev->out_ep) + if (ep == dev->out_ep) { check_read_data (dev, ep, req); - else + memset (req->buf, 0x55, req->length); + } else reinit_write_data (dev, ep, req); 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) reinit_write_data (ep->driver_data, ep, req); + else + memset (req->buf, 0x55, req->length); status = usb_ep_queue (ep, req, gfp_flags); if (status) { -- 2.30.2