Re: linux-next: manual merge of the usb-gadget tree with Linus' tree

Geert Uytterhoeven
2020-01-14T08:42:13Z

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Hi Stephen,

On Fri, Jan 10, 2020 at 5:33 AM Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> Today's linux-next merge of the usb-gadget tree got a conflict in:
>
> drivers/usb/cdns3/gadget.c
>
> between commit:
>
> f616c3bda47e ("usb: cdns3: Fix dequeue implementation.")
>
> from Linus' tree and commit:
>
> 4f1fa63a6dc2 ("usb: cdns3: Add streams support to cadence USB3 DRD driver")
>
> from the usb-gadget tree.
>
> I have no idea how to handle this, so I just dropped the usb-gadget tree
> for today - it clearly needs to be rebased on Linus' tree anyway (it
> has a few shared patches that are different commits and there are
> further changes to this file in Linus' tree as well. rebasing onto
> (or merging with) v5.5-rc6 may be useful.

For today's renesas-drivers, I'm using the attached conflict resolution.

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

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diff --cc drivers/usb/cdns3/gadget.c
index e4820bd4b5791381,4dadc85ad992f08a..0000000000000000
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@@ -1145,37 -1436,56 +1436,64 @@@ static void cdns3_transfer_completed(st
request = cdns3_next_request(&priv_ep->pending_req_list);
priv_req = to_cdns3_request(request);

+ trb = priv_ep->trb_pool + priv_ep->dequeue;
+
+ /* Request was dequeued and TRB was changed to TRB_LINK. */
+ if (TRB_FIELD_TO_TYPE(trb->control) == TRB_LINK) {
+ trace_cdns3_complete_trb(priv_ep, trb);
+ cdns3_move_deq_to_next_trb(priv_req);
+ }
+
- /* Re-select endpoint. It could be changed by other CPU during
- * handling usb_gadget_giveback_request.
- */
- cdns3_select_ep(priv_dev, priv_ep->endpoint.address);
+ if (!request->stream_id) {
+ /* Re-select endpoint. It could be changed by other CPU
+ * during handling usb_gadget_giveback_request.
+ */
+ cdns3_select_ep(priv_dev, priv_ep->endpoint.address);

- if (!cdns3_request_handled(priv_ep, priv_req))
- goto prepare_next_td;
+ if (!cdns3_request_handled(priv_ep, priv_req))
+ goto prepare_next_td;

- trb = priv_ep->trb_pool + priv_ep->dequeue;
- trace_cdns3_complete_trb(priv_ep, trb);
+ trb = priv_ep->trb_pool + priv_ep->dequeue;
+ trace_cdns3_complete_trb(priv_ep, trb);
+
+ if (trb != priv_req->trb)
+ dev_warn(priv_dev->dev,
+ "request_trb=0x%p, queue_trb=0x%p\n",
+ priv_req->trb, trb);

- if (trb != priv_req->trb)
- dev_warn(priv_dev->dev,
- "request_trb=0x%p, queue_trb=0x%p\n",
- priv_req->trb, trb);
+ request->actual = TRB_LEN(le32_to_cpu(trb->length));
+ cdns3_move_deq_to_next_trb(priv_req);
+ cdns3_gadget_giveback(priv_ep, priv_req, 0);

- request->actual = TRB_LEN(le32_to_cpu(trb->length));
- cdns3_move_deq_to_next_trb(priv_req);
- cdns3_gadget_giveback(priv_ep, priv_req, 0);
+ if (priv_ep->type != USB_ENDPOINT_XFER_ISOC &&
+ TRBS_PER_SEGMENT == 2)
+ break;
+ } else {
+ /* Re-select endpoint. It could be changed by other CPU
+ * during handling usb_gadget_giveback_request.
+ */
+ cdns3_select_ep(priv_dev, priv_ep->endpoint.address);
+
+ trb = priv_ep->trb_pool;
+ trace_cdns3_complete_trb(priv_ep, trb);

- if (priv_ep->type != USB_ENDPOINT_XFER_ISOC &&
- TRBS_PER_SEGMENT == 2)
+ if (trb != priv_req->trb)
+ dev_warn(priv_dev->dev,
+ "request_trb=0x%p, queue_trb=0x%p\n",
+ priv_req->trb, trb);
+
+ request->actual += TRB_LEN(le32_to_cpu(trb->length));
+
+ if (!request->num_sgs ||
+ (request->num_sgs == (priv_ep->stream_sg_idx + 1))) {
+ priv_ep->stream_sg_idx = 0;
+ cdns3_gadget_giveback(priv_ep, priv_req, 0);
+ } else {
+ priv_ep->stream_sg_idx++;
+ cdns3_ep_run_stream_transfer(priv_ep, request);
+ }
break;
+ }
}
priv_ep->flags &= ~EP_PENDING_REQUEST;