usb: dwc3: gadget: skip Set/Clear Halt when invalid

At least macOS seems to be sending
ClearFeature(ENDPOINT_HALT) to endpoints which
aren't Halted. This makes DWC3's CLEARSTALL command
time out which causes several issues for the driver.

Instead, let's just return 0 and bail out early.

Cc: <stable@vger.kernel.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 6faf484e5dfcebb3f0cf19f734658e2d9301ac8d..0a664d8eba3ff1bd1234becd1a7be2822186dc83 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1379,6 +1379,9 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol)
                unsigned transfer_in_flight;
                unsigned started;
 
+               if (dep->flags & DWC3_EP_STALL)
+                       return 0;
+
                if (dep->number > 1)
                        trb = dwc3_ep_prev_trb(dep, dep->trb_enqueue);
                else
@@ -1400,6 +1403,8 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol)
                else
                        dep->flags |= DWC3_EP_STALL;
        } else {
+               if (!(dep->flags & DWC3_EP_STALL))
+                       return 0;
 
                ret = dwc3_send_clear_stall_ep_cmd(dep);
                if (ret)