On 24-09-06 06:48:54, Pawel Laszczak wrote:
> Fix changes incorrect usb_request->status returned during disabling
> endpoints. Before fix the status returned during dequeuing requests
> while disabling endpoint was ECONNRESET.
> Patch change it to ESHUTDOWN.
>
> Patch fixes issue detected during testing UVC gadget.
> During stopping streaming the class starts dequeuing usb requests and
> controller driver returns the -ECONNRESET status. After completion
> requests the class or application "uvc-gadget" try to queue this
> request again. Changing this status to ESHUTDOWN cause that UVC assumes
> that endpoint is disabled, or device is disconnected and stops
> re-queuing usb requests.
>
> Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver")
> cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Pawel Laszczak <pawell@xxxxxxxxxxx>
Reviewed-by: Peter Chen <peter.chen@xxxxxxxxxx>
Peter
>
> ---
> Changelog:
> v2:
> - added explanation of issue
>
> drivers/usb/cdns3/cdnsp-ring.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/cdns3/cdnsp-ring.c b/drivers/usb/cdns3/cdnsp-ring.c
> index 1e011560e3ae..bccc8fc143d0 100644
> --- a/drivers/usb/cdns3/cdnsp-ring.c
> +++ b/drivers/usb/cdns3/cdnsp-ring.c
> @@ -718,7 +718,8 @@ int cdnsp_remove_request(struct cdnsp_device *pdev,
> seg = cdnsp_trb_in_td(pdev, cur_td->start_seg, cur_td->first_trb,
> cur_td->last_trb, hw_deq);
>
> - if (seg && (pep->ep_state & EP_ENABLED))
> + if (seg && (pep->ep_state & EP_ENABLED) &&
> + !(pep->ep_state & EP_DIS_IN_RROGRESS))
> cdnsp_find_new_dequeue_state(pdev, pep, preq->request.stream_id,
> cur_td, &deq_state);
> else
> @@ -736,7 +737,8 @@ int cdnsp_remove_request(struct cdnsp_device *pdev,
> * During disconnecting all endpoint will be disabled so we don't
> * have to worry about updating dequeue pointer.
> */
> - if (pdev->cdnsp_state & CDNSP_STATE_DISCONNECT_PENDING) {
> + if (pdev->cdnsp_state & CDNSP_STATE_DISCONNECT_PENDING ||
> + pep->ep_state & EP_DIS_IN_RROGRESS) {
> status = -ESHUTDOWN;
> ret = cdnsp_cmd_set_deq(pdev, pep, &deq_state);
> }
> --
> 2.43.0
>
