diff options
Diffstat (limited to 'drivers/usb/dwc3/gadget.c')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 5e3311e3cc16..4f445f836d32 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -3685,6 +3685,17 @@ static void dwc3_reset_gadget(struct dwc3 *dwc) void dwc3_stop_active_transfer(struct dwc3_ep *dep, bool force, bool interrupt) { + struct dwc3 *dwc = dep->dwc; + + /* + * Only issue End Transfer command to the control endpoint of a started + * Data Phase. Typically we should only do so in error cases such as + * invalid/unexpected direction as described in the control transfer + * flow of the programming guide. + */ + if (dep->number <= 1 && dwc->ep0state != EP0_DATA_PHASE) + return; + if (!(dep->flags & DWC3_EP_TRANSFER_STARTED) || (dep->flags & DWC3_EP_DELAY_STOP) || (dep->flags & DWC3_EP_END_TRANSFER_PENDING)) |