[nrf fromtree] drivers: udc_dwc2: Recover after STALLed OUT Data Stage

Prepare buffer to receive SETUP data on OUT endpoint 0 after endpoint
halt. This solves the issue where the device would no longer process any
control transfers after the first failed transfer with too large OUT
Data Stage (when processing failed due to data stage buffer allocation
failure).

Signed-off-by: Tomasz Moń <[email protected]>
(cherry picked from commit 883b77f)
(cherry picked from commit 82c286d)

Author: tmon-nordic

drivers/usb/udc/udc_dwc2.c

@@ -1591,6 +1591,9 @@ static int udc_dwc2_ep_set_halt(const struct device *dev,
 	LOG_DBG("Set halt ep 0x%02x", cfg->addr);
 	if (ep_idx != 0) {
 		cfg->stat.halted = true;
+	} else if (!udc_buf_peek(dev, USB_CONTROL_EP_OUT)) {
+		/* Data stage is STALLed, allow receiving next SETUP */
+		dwc2_ctrl_feed_dout(dev, 8);
 	}
 
 	return 0;