Hi Wesley,
On Thu, Sep 01, 2022 at 11:43:10AM -0700, Wesley Cheng wrote:
> If DWC3_EP_DELAYED_STOP is set during stop active transfers, then do not
> continue attempting to unmap request buffers during dwc3_remove_requests().
> This can lead to SMMU faults, as the controller has not stopped the
> processing of the TRB. Defer this sequence to the EP0 out start, which
> ensures that there are no pending SETUP transactions before issuing the
> endxfer.
>
> Reviewed-by: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>
> Signed-off-by: Wesley Cheng <quic_wcheng@xxxxxxxxxxx>
> ---
> drivers/usb/dwc3/core.h | 3 +++
> drivers/usb/dwc3/ep0.c | 5 ++++-
> drivers/usb/dwc3/gadget.c | 6 +++++-
> 3 files changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
> index 4fe4287dc934..7d5d2507244b 100644
> --- a/drivers/usb/dwc3/core.h
> +++ b/drivers/usb/dwc3/core.h
> @@ -1560,6 +1560,7 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned int cmd,
> int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned int cmd,
> u32 param);
> void dwc3_gadget_clear_tx_fifos(struct dwc3 *dwc);
> +void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep, int status);
> #else
> static inline int dwc3_gadget_init(struct dwc3 *dwc)
> { return 0; }
> @@ -1581,6 +1582,8 @@ static inline int dwc3_send_gadget_generic_command(struct dwc3 *dwc,
> { return 0; }
> static inline void dwc3_gadget_clear_tx_fifos(struct dwc3 *dwc)
> { }
> +static inline void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep)
Oops, you missed updating this with the additional 'status' parameter as
well.
Jack
