[PATCH 4.4 094/266] usb: gadget: net2272: Fix net2272_dequeue()

From: Greg Kroah-Hartman
Date: Wed May 15 2019 - 08:13:59 EST

[ Upstream commit 091dacc3cc10979ab0422f0a9f7fcc27eee97e69 ]

Restore the status of ep->stopped in function net2272_dequeue().

When the given request is not found in the endpoint queue
the function returns -EINVAL without restoring the state of
ep->stopped. Thus the endpoint keeps blocked and does not transfer
any data anymore.

This fix is only compile-tested, since we do not have a
corresponding hardware. An analogous fix was tested in the sibling
driver. See "usb: gadget: net2280: Fix net2280_dequeue()"

Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Guido Kiener <guido.kiener@xxxxxxxxxxxxxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin (Microsoft) <sashal@xxxxxxxxxx>
drivers/usb/gadget/udc/net2272.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
index 3b6e34fc032b..553922c3be85 100644
--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -962,6 +962,7 @@ net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req)
if (&req->req != _req) {
+ ep->stopped = stopped;
spin_unlock_irqrestore(&ep->dev->lock, flags);
return -EINVAL;