From 75bb93be0027123b5db6cbcce89eb62f0f6b3c5b Mon Sep 17 00:00:00 2001
From: Fabian Vogt <fabian@ritter-vogt.de>
Date: Wed, 24 Mar 2021 15:11:15 +0100
Subject: [PATCH] fotg210-udc: Complete OUT requests on short packets
Git-commit: 75bb93be0027123b5db6cbcce89eb62f0f6b3c5b
Patch-mainline: v5.13-rc1
References: git-fixes
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>
Link: https://lore.kernel.org/r/20210324141115.9384-8-fabian@ritter-vogt.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/usb/gadget/udc/fotg210-udc.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/udc/fotg210-udc.c b/drivers/usb/gadget/udc/fotg210-udc.c
index e4036a689adb..fdca28e72a3b 100644
--- a/drivers/usb/gadget/udc/fotg210-udc.c
+++ b/drivers/usb/gadget/udc/fotg210-udc.c
@@ -849,12 +849,16 @@ 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);
}
--
2.26.2