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usb: dwc3: ep0: don't change to configured state too early

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before changing to configured state, we need
to wait until gadget driver has had a chance
to process the request.

In case of USB_GADGET_DELAYED_STATUS, that means
we need to defer usb_gadget_set_state() until
the upcoming usb_ep_queue().

Reported-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2013-07-22 12:41:47 +03:00
parent 7a42d83536
commit 7c81290e87
1 changed files with 11 additions and 2 deletions
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9
drivers/usb/dwc3/ep0.c
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@ -148,6 +148,7 @@ static int __dwc3_gadget_ep0_queue(struct dwc3_ep *dep,
direction = !dwc->ep0_expect_in;
dwc->delayed_status = false;
usb_gadget_set_state(&dwc->gadget, USB_STATE_CONFIGURED);
if (dwc->ep0state == EP0_STATUS_PHASE)
__dwc3_ep0_do_control_status(dwc, dwc->eps[direction]);
@ -533,6 +534,14 @@ static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
ret = dwc3_ep0_delegate_req(dwc, ctrl);
/* if the cfg matches and the cfg is non zero */
if (cfg && (!ret || (ret == USB_GADGET_DELAYED_STATUS))) {
/*
* only change state if set_config has already
* been processed. If gadget driver returns
* USB_GADGET_DELAYED_STATUS, we will wait
* to change the state on the next usb_ep_queue()
*/
if (ret == 0)
usb_gadget_set_state(&dwc->gadget,
USB_STATE_CONFIGURED);