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[7/7] fotg210-udc: Complete OUT requests on short packets

Message ID 20210324141115.9384-8-fabian@ritter-vogt.de
State New
Headers show
Series Fix the fotg210-udc driver | expand

Commit Message

Fabian Vogt March 24, 2021, 2:11 p.m. UTC 
A short packet indicates the end of a transfer and marks the request as
complete.

Fixes: b84a8dee23fd ("usb: gadget: add Faraday fotg210_udc driver")
Signed-off-by: Fabian Vogt <fabian@ritter-vogt.de>
---
 drivers/usb/gadget/udc/fotg210-udc.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/usb/gadget/udc/fotg210-udc.c b/drivers/usb/gadget/udc/fotg210-udc.c
index 7716bd1c8753..6cb7daf725b9 100644
--- a/drivers/usb/gadget/udc/fotg210-udc.c
+++ b/drivers/usb/gadget/udc/fotg210-udc.c
@@ -863,12 +863,16 @@  static void fotg210_out_fifo_handler(struct fotg210_ep *ep)
 {
 	struct fotg210_request *req = list_entry(ep->queue.next,
 						 struct fotg210_request, queue);
+	int disgr1 = ioread32(ep->fotg210->reg + FOTG210_DISGR1);
 
 	fotg210_start_dma(ep, req);
 
-	/* finish out transfer */
+	/* Complete the request when it's full or a short packet arrived.
+	 * Like other drivers, short_not_ok isn't handled.
+	 */
+
 	if (req->req.length == req->req.actual ||
-	    req->req.actual < ep->ep.maxpacket)
+	    (disgr1 & DISGR1_SPK_INT(ep->epnum - 1)))
 		fotg210_done(ep, req, 0);
 }