>
>On 24-09-05 07:31:10, 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 changes it to ESHUTDOWN.
>
>Would you please explain why we need this change?
This patch is needed for 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
assume that endpoint is disabled, or device is disconnected and
stop re-queuing usb requests.
Thanks,
Pawel
>
>Peter
>
>>
>> Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence
>> USBSSP DRD Driver")
>> cc: stable@xxxxxxxxxxxxxxx
>> Signed-off-by: Pawel Laszczak <pawell@xxxxxxxxxxx>
>> ---
>> 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
>>
