Commit 926a81d6 authored by Felipe Balbi's avatar Felipe Balbi Committed by Ben Hutchings

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

commit ffb80fc6 upstream.

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.
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent 15367f10
......@@ -1346,6 +1346,9 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol)
memset(&params, 0x00, sizeof(params));
if (value) {
if (dep->flags & DWC3_EP_STALL)
return 0;
if (!protocol && ((dep->direction && dep->flags & DWC3_EP_BUSY) ||
(!list_empty(&dep->req_queued) ||
!list_empty(&dep->request_list)))) {
......@@ -1362,6 +1365,9 @@ 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_gadget_ep_cmd(dwc, dep->number,
DWC3_DEPCMD_CLEARSTALL, &params);
if (ret)
......
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