[nrf fromtree] drivers: udc_dwc2: Stop OUT transfers on ZLP

The transfer is finished after ZLP is transmitted. Do not re-enable the endpoint waiting for more data. Signed-off-by: Tomasz Moń <[email protected]> (cherry picked from commit ea72b27f3dbeabd9f07254b077ba9a8baf3c0b73)
nrfconnect · Feb 10, 2025 · a82f2fc · a82f2fc
1 parent 5ee4d80
commit a82f2fc
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/usb/udc/udc_dwc2.c b/drivers/usb/udc/udc_dwc2.c
@@ -2540,7 +2540,7 @@ static inline void dwc2_handle_out_xfercompl(const struct device *dev,
 		net_buf_add(buf, bcnt);
 	}
 
-	if (!is_iso && (bcnt % udc_mps_ep_size(ep_cfg)) == 0 &&
+	if (!is_iso && bcnt && (bcnt % udc_mps_ep_size(ep_cfg)) == 0 &&
 	    net_buf_tailroom(buf)) {
 		dwc2_prep_rx(dev, buf, ep_cfg);
 	} else {