> >> Endpoint can defer transition to Halted state if endpoint has pending
> >> requests.
> >
> >The implementation of halt handling is a little complicated, you may
> >consider return -EAGAIN for functional stall through usb_ep_set_halt
> >from function driver if the requests are pending, it doesn't need to
> >defer such kinds of functional stall.
>
> Yes, I remember your suggestion regarding using EAGAIN, but f_mass_storage
> Driver simple check the status and try to stall endpoint again after 100 ms.
>
> What if Command Verifier ask for endpoint status before this time, or if the transfer
> will not be finished on time ? Then the CV test may fail.
>
> So solution from this patch should be more certain.
>
Your description is reasonable, since I have not met this issue, I would like
to know more about it:
It occurs at CV9 or MSC test? For CV9 test, it may not try to stall non-ep0.
Which test case was failed?
Peter
> >
> >Peter
> >> Patch add additional condition that allows to return correct endpoint
> >> status during Get Endpoint Status request even if the halting
> >> endpoint is in progress.
> >>
> >> Reported-by: Rahul Kumar <kurahul@xxxxxxxxxxx>
> >> Signed-off-by: Rahul Kumar <kurahul@xxxxxxxxxxx>
> >> Signed-off-by: Pawel Laszczak <pawell@xxxxxxxxxxx>
> >> Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver")
> >> ---
> >> drivers/usb/cdns3/ep0.c | 10 ++++++++--
> >> 1 file changed, 8 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/drivers/usb/cdns3/ep0.c b/drivers/usb/cdns3/ep0.c index
> >> 44f652e8b5a2..10ae03430f34 100644
> >> --- a/drivers/usb/cdns3/ep0.c
> >> +++ b/drivers/usb/cdns3/ep0.c
> >> @@ -234,9 +234,11 @@ static int cdns3_req_ep0_set_address(struct
> >> cdns3_device *priv_dev, static int cdns3_req_ep0_get_status(struct
> cdns3_device *priv_dev,
> >> struct usb_ctrlrequest *ctrl) {
> >> + struct cdns3_endpoint *priv_ep;
> >> __le16 *response_pkt;
> >> u16 usb_status = 0;
> >> u32 recip;
> >> + u8 index;
> >>
> >> recip = ctrl->bRequestType & USB_RECIP_MASK;
> >>
> >> @@ -262,9 +264,13 @@ static int cdns3_req_ep0_get_status(struct
> cdns3_device *priv_dev,
> >> case USB_RECIP_INTERFACE:
> >> return cdns3_ep0_delegate_req(priv_dev, ctrl);
> >> case USB_RECIP_ENDPOINT:
> >> - /* check if endpoint is stalled */
> >> + index = cdns3_ep_addr_to_index(ctrl->wIndex);
> >> + priv_ep = priv_dev->eps[index];
> >> +
> >> + /* check if endpoint is stalled or stall is pending */
> >> cdns3_select_ep(priv_dev, ctrl->wIndex);
> >> - if (EP_STS_STALL(readl(&priv_dev->regs->ep_sts)))
> >> + if (EP_STS_STALL(readl(&priv_dev->regs->ep_sts)) ||
> >> + (priv_ep->flags & EP_STALL_PENDING))
> >> usb_status = BIT(USB_ENDPOINT_HALT);
> >> break;
> >> default:
> >> --
> >> 2.17.1
> >>
> >
> >--
> >
> >Thanks,
> >Peter Chen
>
> Regards,
> Pawel
