[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 <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c
index 51424f6..68e3d8f 100644
--- a/drivers/usb/gadget/zero.c
+++ b/drivers/usb/gadget/zero.c
@@ -572,9 +572,10 @@
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 @@
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) {