xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

usb: gadget: composite: let USB functions process ctrl reqs in cfg0

Browse Source 
It can sometimes be necessary for gadget drivers to process non-standard
control requests, which host devices can send without having sent
USB_REQ_SET_CONFIGURATION.

Therefore, the req_match() usb_function method is enhanced with the new
parameter "config0". When a USB configuration is active, this parameter
is false. When a non-core control request is processed in
composite_setup(), without an active configuration, req_match() of the
USB functions of all available configurations which implement this
function, is called with config0=true. Then the control request gets
processed by the first usb_function instance whose req_match() returns
true.

Signed-off-by: Felix Hädicke <felixhaedicke@web.de>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felix Hädicke
2016-06-22 01:12:08 +02:00
committed by Felipe Balbi
parent 54dfce6d07
commit 1a00b457a5
4 changed files with 24 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/usb/gadget/function/f_printer.c
View File

@@ -889,13 +889,17 @@ static void printer_soft_reset(struct printer_dev *dev)
/*-------------------------------------------------------------------------*/
static bool gprinter_req_match(struct usb_function *f,
const struct usb_ctrlrequest *ctrl)
const struct usb_ctrlrequest *ctrl,
bool config0)
{
struct printer_dev *dev = func_to_printer(f);
u16 w_index = le16_to_cpu(ctrl->wIndex);
u16 w_value = le16_to_cpu(ctrl->wValue);
u16 w_length = le16_to_cpu(ctrl->wLength);
if (config0)
return false;
if ((ctrl->bRequestType & USB_RECIP_MASK) != USB_RECIP_INTERFACE ||
(ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS)
return false;