diff options
| author | Felipe Balbi <balbi@ti.com> | 2013-07-22 13:41:47 +0400 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-07-29 14:57:04 +0400 |
| commit | 7c81290e87bf01b507deabf0f478e051367cb416 (patch) | |
| tree | 0e378bf02105063f5a9e7622b135f6cc9a1768ff /drivers/usb/dwc3/ep0.c | |
| parent | 7a42d83536a5ea7ea7b4ad279c34c4c4ce509b5a (diff) | |
| download | linux-7c81290e87bf01b507deabf0f478e051367cb416.tar.xz | |
usb: dwc3: ep0: don't change to configured state too early
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>
Diffstat (limited to 'drivers/usb/dwc3/ep0.c')
| -rw-r--r-- | drivers/usb/dwc3/ep0.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index 007651c21638..7fa93f4bc507 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -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]); @@ -533,8 +534,16 @@ 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))) { - usb_gadget_set_state(&dwc->gadget, - USB_STATE_CONFIGURED); + + /* + * 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); /* * Enable transition to U1/U2 state when |