usb: gadget: net2272: Fix net2272_dequeue()

BugLink: https://bugs.launchpad.net/bugs/1830934
[ 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@rowland.harvard.edu>
Signed-off-by: Guido Kiener <guido.kiener@rohde-schwarz.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
index b77f3126580ebb937986e7ced5b28739dd25dea4..c2011cd7df8cf5fbf0c5a5db153c37a1b0f451a6 100644 (file)
--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -945,6 +945,7 @@ net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req)
                        break;
        }
        if (&req->req != _req) {
+               ep->stopped = stopped;
                spin_unlock_irqrestore(&ep->dev->lock, flags);
                return -EINVAL;
        }