usb: dwc3: gadget: Fix request complete check

BugLink: https://bugs.launchpad.net/bugs/1860130
commit ea0d762775e20aaff7909a3f0866ff1688b1c618 upstream.

We can only check for IN direction if the request had completed. For OUT
direction, it's perfectly fine that the host can send less than the
setup length. Let's return true fall all cases of OUT direction.

Fixes: e0c42ce590fe ("usb: dwc3: gadget: simplify IOC handling")
Cc: stable@vger.kernel.org
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Link: https://lore.kernel.org/r/ac5a3593a94fdaa3d92e6352356b5f7a01ccdc7c.1576291140.git.thinhn@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 0c960a97ea0214ed73e5fe018587aafb6c8d3d8f..154f3f3e8cff849754904721e2f0730f25fff7cd 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2467,6 +2467,13 @@ static int dwc3_gadget_ep_reclaim_trb_linear(struct dwc3_ep *dep,
 
 static bool dwc3_gadget_ep_request_completed(struct dwc3_request *req)
 {
+       /*
+        * For OUT direction, host may send less than the setup
+        * length. Return true for all OUT requests.
+        */
+       if (!req->direction)
+               return true;
+
        return req->request.actual == req->request.length;
 }