From: Sebastian Bauer Date: Thu, 21 Jul 2011 13:40:07 +0000 (+0200) Subject: usb: gadget: hid: don't STALL when processing a HID Descriptor request X-Git-Tag: firefly_0821_release~3680^2~4661^2~20^2~2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c240d78a8f9b1d4e1d391203f4a698117fae3474;p=firefly-linux-kernel-4.4.55.git usb: gadget: hid: don't STALL when processing a HID Descriptor request 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 Acked-by: Peter Korsgaard Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/gadget/f_hid.c b/drivers/usb/gadget/f_hid.c index 403a48bcf560..83a266bdb40e 100644 --- a/drivers/usb/gadget/f_hid.c +++ b/drivers/usb/gadget/f_hid.c @@ -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,