On 19-10-07 07:39:11, Pawel Laszczak wrote:
> Patch fixes issue with Halt Endnpoint Test observed
%s/Endnpoint/Endpoint
>
> during using g_zero
> driver as DUT. Bug occurred only on some testing board.
g_zero is legacy, please use configfs function source_sink or loopback
instead.
>
> 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.
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 <kura...@cadence.com>
> Signed-off-by: Rahul Kumar <kura...@cadence.com>
> Signed-off-by: Pawel Laszczak <paw...@cadence.com>
> 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
