Felipe Balbi <balbi@xxxxxx> writes:
> So far, dwc3 has always missed request->zero
> handling for every endpoint. Let's implement
> that so we can handle cases where transfer must
> be finished with a ZLP.
>
> Note that dwc3 is a little special. Even though
> we're dealing with a ZLP, we still need a buffer
> of wMaxPacketSize bytes; to hide that detail from
> every gadget driver, we have a preallocated buffer
> of 1024 bytes (biggest bulk size) to use (and
> share) among all endpoints.
>
> Reported-by: Ravi B <ravibabu@xxxxxx>
> Signed-off-by: Felipe Balbi <balbi@xxxxxx>
> ---
> drivers/usb/dwc3/core.h | 4 ++++
> drivers/usb/dwc3/gadget.c | 51 +++++++++++++++++++++++++++++++++++++++++++++--
> 2 files changed, 53 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
> index 36f1cb74588c..c198e52ac9f7 100644
> --- a/drivers/usb/dwc3/core.h
> +++ b/drivers/usb/dwc3/core.h
> @@ -37,6 +37,7 @@
> #define DWC3_MSG_MAX 500
>
> /* Global constants */
> +#define DWC3_ZLP_BUF_SIZE 1024 /* size of a superspeed bulk */
> #define DWC3_EP0_BOUNCE_SIZE 512
> #define DWC3_ENDPOINTS_NUM 32
> #define DWC3_XHCI_RESOURCES_NUM 2
> @@ -632,6 +633,7 @@ struct dwc3_request {
> unsigned direction:1;
> unsigned mapped:1;
> unsigned queued:1;
> + unsigned free_on_complete:1;
unnecessary flag. Forgot to remove it when cleaning up the patch. I'll
send v2.
--
balbi
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