From: Tao Wang <[email protected]>
it stuck in usb_kill_urb() due to urb use_count will not become zero,
this means urb giveback is not happen.
in xhci_handle_cmd_set_deq() will giveback urb if td's cancel_status
equal to TD_CLEARING_CACHE,
but in xhci_invalidate_cancelled_tds(), only last canceled td's
cancel_status change to TD_CLEARING_CACHE,
thus giveback only happen to last urb.
this change set all cancelled_td's cancel_status to TD_CLEARING_CACHE
rather than the last one, so all urb can giveback.
Signed-off-by: Tao Wang <[email protected]>
---
drivers/usb/host/xhci-ring.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 8fea44b..c7dd7c0 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -960,19 +960,19 @@ static int xhci_invalidate_cancelled_tds(struct xhci_virt_ep *ep)
td_to_noop(xhci, ring, td, false);
td->cancel_status = TD_CLEARED;
}
- }
- if (cached_td) {
- cached_td->cancel_status = TD_CLEARING_CACHE;
-
- err = xhci_move_dequeue_past_td(xhci, slot_id, ep->ep_index,
- cached_td->urb->stream_id,
- cached_td);
- /* Failed to move past cached td, try just setting it noop */
- if (err) {
- td_to_noop(xhci, ring, cached_td, false);
- cached_td->cancel_status = TD_CLEARED;
+ if (cached_td) {
+ cached_td->cancel_status = TD_CLEARING_CACHE;
+
+ err = xhci_move_dequeue_past_td(xhci, slot_id, ep->ep_index,
+ cached_td->urb->stream_id,
+ cached_td);
+ /* Failed to move past cached td, try just setting it noop */
+ if (err) {
+ td_to_noop(xhci, ring, cached_td, false);
+ cached_td->cancel_status = TD_CLEARED;
+ }
+ cached_td = NULL;
}
- cached_td = NULL;
}
return 0;
}
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
Hi usb teams,
I have a patch about xhci-ring, can you help me to check?
you can contact me if you have any question.
On 2021-08-12 20:02, Tao Wang wrote:
> From: Tao Wang <[email protected]>
>
> it stuck in usb_kill_urb() due to urb use_count will not become zero,
> this means urb giveback is not happen.
> in xhci_handle_cmd_set_deq() will giveback urb if td's cancel_status
> equal to TD_CLEARING_CACHE,
> but in xhci_invalidate_cancelled_tds(), only last canceled td's
> cancel_status change to TD_CLEARING_CACHE,
> thus giveback only happen to last urb.
>
> this change set all cancelled_td's cancel_status to TD_CLEARING_CACHE
> rather than the last one, so all urb can giveback.
>
> Signed-off-by: Tao Wang <[email protected]>
> ---
> drivers/usb/host/xhci-ring.c | 24 ++++++++++++------------
> 1 file changed, 12 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/usb/host/xhci-ring.c
> b/drivers/usb/host/xhci-ring.c
> index 8fea44b..c7dd7c0 100644
> --- a/drivers/usb/host/xhci-ring.c
> +++ b/drivers/usb/host/xhci-ring.c
> @@ -960,19 +960,19 @@ static int xhci_invalidate_cancelled_tds(struct
> xhci_virt_ep *ep)
> td_to_noop(xhci, ring, td, false);
> td->cancel_status = TD_CLEARED;
> }
> - }
> - if (cached_td) {
> - cached_td->cancel_status = TD_CLEARING_CACHE;
> -
> - err = xhci_move_dequeue_past_td(xhci, slot_id, ep->ep_index,
> - cached_td->urb->stream_id,
> - cached_td);
> - /* Failed to move past cached td, try just setting it noop */
> - if (err) {
> - td_to_noop(xhci, ring, cached_td, false);
> - cached_td->cancel_status = TD_CLEARED;
> + if (cached_td) {
> + cached_td->cancel_status = TD_CLEARING_CACHE;
> +
> + err = xhci_move_dequeue_past_td(xhci, slot_id, ep->ep_index,
> + cached_td->urb->stream_id,
> + cached_td);
> + /* Failed to move past cached td, try just setting it noop */
> + if (err) {
> + td_to_noop(xhci, ring, cached_td, false);
> + cached_td->cancel_status = TD_CLEARED;
> + }
> + cached_td = NULL;
> }
> - cached_td = NULL;
> }
> return 0;
> }
sorry， This email is invalid because some reason, I will submit another
email for it.
On 2021-08-13 09:44, [email protected] wrote:
> Hi usb teams,
>
> I have a patch about xhci-ring, can you help me to check?
>
> you can contact me if you have any question.
>
>
> On 2021-08-12 20:02, Tao Wang wrote:
>> From: Tao Wang <[email protected]>
>>
>> it stuck in usb_kill_urb() due to urb use_count will not become zero,
>> this means urb giveback is not happen.
>> in xhci_handle_cmd_set_deq() will giveback urb if td's cancel_status
>> equal to TD_CLEARING_CACHE,
>> but in xhci_invalidate_cancelled_tds(), only last canceled td's
>> cancel_status change to TD_CLEARING_CACHE,
>> thus giveback only happen to last urb.
>>
>> this change set all cancelled_td's cancel_status to TD_CLEARING_CACHE
>> rather than the last one, so all urb can giveback.
>>
>> Signed-off-by: Tao Wang <[email protected]>
>> ---
>> drivers/usb/host/xhci-ring.c | 24 ++++++++++++------------
>> 1 file changed, 12 insertions(+), 12 deletions(-)
>>
>> diff --git a/drivers/usb/host/xhci-ring.c
>> b/drivers/usb/host/xhci-ring.c
>> index 8fea44b..c7dd7c0 100644
>> --- a/drivers/usb/host/xhci-ring.c
>> +++ b/drivers/usb/host/xhci-ring.c
>> @@ -960,19 +960,19 @@ static int xhci_invalidate_cancelled_tds(struct
>> xhci_virt_ep *ep)
>> td_to_noop(xhci, ring, td, false);
>> td->cancel_status = TD_CLEARED;
>> }
>> - }
>> - if (cached_td) {
>> - cached_td->cancel_status = TD_CLEARING_CACHE;
>> -
>> - err = xhci_move_dequeue_past_td(xhci, slot_id, ep->ep_index,
>> - cached_td->urb->stream_id,
>> - cached_td);
>> - /* Failed to move past cached td, try just setting it noop */
>> - if (err) {
>> - td_to_noop(xhci, ring, cached_td, false);
>> - cached_td->cancel_status = TD_CLEARED;
>> + if (cached_td) {
>> + cached_td->cancel_status = TD_CLEARING_CACHE;
>> +
>> + err = xhci_move_dequeue_past_td(xhci, slot_id, ep->ep_index,
>> + cached_td->urb->stream_id,
>> + cached_td);
>> + /* Failed to move past cached td, try just setting it noop */
>> + if (err) {
>> + td_to_noop(xhci, ring, cached_td, false);
>> + cached_td->cancel_status = TD_CLEARED;
>> + }
>> + cached_td = NULL;
>> }
>> - cached_td = NULL;
>> }
>> return 0;
>> }