On 11/4/2018 11:11 PM, Felipe Balbi wrote:
> Both flags are used for the same purpose in dwc3: appending an extra
> TRB at the end to deal with controller requirements. By combining both
> flags into one, we make it clear that the situation is the same and
> that they should be treated equally.
>
> Signed-off-by: Felipe Balbi <felipe.ba...@linux.intel.com>
> ---
> drivers/usb/dwc3/core.h | 7 +++----
> drivers/usb/dwc3/gadget.c | 17 ++++++++---------
> 2 files changed, 11 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
> index 5bfb62533e0f..4872cba8699b 100644
> --- a/drivers/usb/dwc3/core.h
> +++ b/drivers/usb/dwc3/core.h
> @@ -847,11 +847,11 @@ struct dwc3_hwparams {
> * @epnum: endpoint number to which this request refers
> * @trb: pointer to struct dwc3_trb
> * @trb_dma: DMA address of @trb
> - * @unaligned: true for OUT endpoints with length not divisible by maxp
> + * @needs_extra_trb: true when request needs one extra TRB (either due to ZLP
> + * or unaligned OUT)
> * @direction: IN or OUT direction flag
> * @mapped: true when request has been dma-mapped
> * @started: request is started
> - * @zero: wants a ZLP
> */
> struct dwc3_request {
> struct usb_request request;
> @@ -867,11 +867,10 @@ struct dwc3_request {
> struct dwc3_trb *trb;
> dma_addr_t trb_dma;
>
> - unsigned unaligned:1;
> + unsigned needs_extra_trb:1;
> unsigned direction:1;
> unsigned mapped:1;
> unsigned started:1;
> - unsigned zero:1;
> };
>
> /*
> diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> index 2de1a3971a26..502a85707e65 100644
> --- a/drivers/usb/dwc3/gadget.c
> +++ b/drivers/usb/dwc3/gadget.c
> @@ -1064,7 +1064,7 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
> struct dwc3 *dwc = dep->dwc;
> struct dwc3_trb *trb;
>
> - req->unaligned = true;
> + req->needs_extra_trb = true;
>
> /* prepare normal TRB */
> dwc3_prepare_one_trb(dep, req, true, i);
> @@ -1108,7 +1108,7 @@ static void dwc3_prepare_one_trb_linear(struct dwc3_ep
> *dep,
> struct dwc3 *dwc = dep->dwc;
> struct dwc3_trb *trb;
>
> - req->unaligned = true;
> + req->needs_extra_trb = true;
>
> /* prepare normal TRB */
> dwc3_prepare_one_trb(dep, req, true, 0);
> @@ -1124,7 +1124,7 @@ static void dwc3_prepare_one_trb_linear(struct dwc3_ep
> *dep,
> struct dwc3 *dwc = dep->dwc;
> struct dwc3_trb *trb;
>
> - req->zero = true;
> + req->needs_extra_trb = true;
>
> /* prepare normal TRB */
> dwc3_prepare_one_trb(dep, req, true, 0);
> @@ -1406,7 +1406,7 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
> dwc3_ep_inc_deq(dep);
> }
>
> - if (r->unaligned || r->zero) {
> + if (r->needs_extra_trb) {
> trb = r->trb + r->num_pending_sgs + 1;
> trb->ctrl &= ~DWC3_TRB_CTRL_HWO;
> dwc3_ep_inc_deq(dep);
> @@ -1417,7 +1417,7 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
> trb->ctrl &= ~DWC3_TRB_CTRL_HWO;
> dwc3_ep_inc_deq(dep);
>
> - if (r->unaligned || r->zero) {
> + if (r->needs_extra_trb) {
> trb = r->trb + 1;
> trb->ctrl &= ~DWC3_TRB_CTRL_HWO;
> dwc3_ep_inc_deq(dep);
> @@ -2250,7 +2250,7 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct
> dwc3_ep *dep,
> * with one TRB pending in the ring. We need to manually clear HWO bit
> * from that TRB.
> */
> - if ((req->zero || req->unaligned) && !(trb->ctrl & DWC3_TRB_CTRL_CHN)) {
> + if (req->needs_extra_trb && !(trb->ctrl & DWC3_TRB_CTRL_CNH)) {
DWC3_TRB_CTRL_CNH -> DWC3_TRB_CTRL_CHN
Thinh
