usb: dwc3: gadget: properly check ep cmd
The cmd argument we pass to dwc3_send_gadget_ep_cmd() could contain extra arguments embedded. When checking for StartTransfer command, we need to make sure to match only lower 4 bits which contain the actual command and ignore the rest. Reported-by: NJanusz Dziedzic <januszx.dziedzic@intel.com> Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>
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