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usb: gadget: hid: don't STALL when processing a HID Descriptor request

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This is a patch to fix an issue with the HID gadget which, at the moment,
returns STALL on a HID descriptor request. Essentially, the patch changes
the hid gadget such that a request for the HID descriptor is handled by
copying the descriptor into the response buffer, rather than falling
through the default case, in which the request is answered by a STALL.

Signed-off-by: Sebastian Bauer <mail@sebastianbauer.info>
Acked-by: Peter Korsgaard <peter.korsgaard@barco.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Sebastian Bauer 2011-07-21 15:40:07 +02:00 committed by Felipe Balbi
parent 26e5c3e227
commit 71964b9a0c
1 changed files with 7 additions and 0 deletions
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7
drivers/usb/gadget/f_hid.c
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@ -367,6 +367,13 @@ static int hidg_setup(struct usb_function *f,
case ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8
| USB_REQ_GET_DESCRIPTOR):
switch (value >> 8) {
case HID_DT_HID:
VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: HID\n");
length = min_t(unsigned short, length,
hidg_desc.bLength);
memcpy(req->buf, &hidg_desc, length);
goto respond;
break;
case HID_DT_REPORT:
VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: REPORT\n");
length = min_t(unsigned short, length,