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

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commit ffb80fc672c3a7b6afd0cefcb1524fb99917b2f3 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: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Felipe Balbi 2017-01-19 13:38:42 +02:00 committed by Greg Kroah-Hartman
parent 5413f432a1
commit 3ccf60e1ff
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/dwc3/gadget.c
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@ -1234,6 +1234,9 @@ 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
@ -1258,6 +1261,8 @@ 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)