[PATCH 5.11 201/601] fotg210-udc: Fix EP0 IN requests bigger than two packets

Greg Kroah-Hartman
2021-05-12T17:13:27Z

From: Fabian Vogt <fabian@ritter-vogt.de>

[ Upstream commit 078ba935651e149c92c41161e0322e3372cc2705 ]

For a 134 Byte packet, it sends the first two 64 Byte packets just fine,
but then notice that less than a packet is remaining and call fotg210_done
without actually sending the rest.

Fixes: b84a8dee23fd ("usb: gadget: add Faraday fotg210_udc driver")
Signed-off-by: Fabian Vogt <fabian@ritter-vogt.de>
Link: https://lore.kernel.org/r/20210324141115.9384-3-fabian@ritter-vogt.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/usb/gadget/udc/fotg210-udc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/fotg210-udc.c b/drivers/usb/gadget/udc/fotg210-udc.c
index 39260007ebf8..345827cf1b64 100644
--- a/drivers/usb/gadget/udc/fotg210-udc.c
+++ b/drivers/usb/gadget/udc/fotg210-udc.c
@@ -820,7 +820,7 @@ static void fotg210_ep0in(struct fotg210_udc *fotg210)
if (req->req.length)
fotg210_start_dma(ep, req);

- if ((req->req.length - req->req.actual) < ep->ep.maxpacket)
+ if (req->req.actual == req->req.length)
fotg210_done(ep, req, 0);
} else {
fotg210_set_cxdone(fotg210);
--
2.30.2