queue-4.4/usb-gadget-net2272-fix-net2272_dequeue.patch

   1 From 7adf2316b536a8827fe3880f48c5432d8fe731f2 Mon Sep 17 00:00:00 2001
   2 From: Guido Kiener <guido@kiener-muenchen.de>
   3 Date: Mon, 18 Mar 2019 09:18:34 +0100
   4 Subject: usb: gadget: net2272: Fix net2272_dequeue()
   5
   6 [ Upstream commit 091dacc3cc10979ab0422f0a9f7fcc27eee97e69 ]
   7
   8 Restore the status of ep->stopped in function net2272_dequeue().
   9
  10 When the given request is not found in the endpoint queue
  11 the function returns -EINVAL without restoring the state of
  12 ep->stopped. Thus the endpoint keeps blocked and does not transfer
  13 any data anymore.
  14
  15 This fix is only compile-tested, since we do not have a
  16 corresponding hardware. An analogous fix was tested in the sibling
  17 driver. See "usb: gadget: net2280: Fix net2280_dequeue()"
  18
  19 Acked-by: Alan Stern <stern@rowland.harvard.edu>
  20 Signed-off-by: Guido Kiener <guido.kiener@rohde-schwarz.com>
  21 Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
  22 Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>
  23 ---
  24  drivers/usb/gadget/udc/net2272.c | 1 +
  25  1 file changed, 1 insertion(+)
  26
  27 diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
  28 index 3b6e34fc032b..553922c3be85 100644
  29 --- a/drivers/usb/gadget/udc/net2272.c
  30 +++ b/drivers/usb/gadget/udc/net2272.c
  31 @@ -962,6 +962,7 @@ net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req)
  32                         break;
  33         }
  34         if (&req->req != _req) {
  35 +               ep->stopped = stopped;
  36                 spin_unlock_irqrestore(&ep->dev->lock, flags);
  37                 return -EINVAL;
  38         }
  39 --
  40 2.19.1
  41