update usb enum return codes

Should have been fixed in commit 85be1e5e7b when we updated the library, but was... missed.
travis caught it after the fact at least.

examples/stm32/f1/lisa-m-1/usb_cdcacm/cdcacm.c

@@ -192,15 +192,15 @@ static enum usbd_request_return_codes cdcacm_control_request(usbd_device *usbd_d
 		local_buf[8] = req->wValue & 3;
 		local_buf[9] = 0;
 		// usbd_ep_write_packet(0x83, buf, 10);
-		return 1;
+		return USBD_REQ_HANDLED;
 		}
 	case USB_CDC_REQ_SET_LINE_CODING:
 		if (*len < sizeof(struct usb_cdc_line_coding))
-			return 0;
+			return USBD_REQ_NOTSUPP;
 
-		return 1;
+		return USBD_REQ_HANDLED;
 	}
-	return 0;
+	return USBD_REQ_NOTSUPP;
 }
 
 static void cdcacm_data_rx_cb(usbd_device *usbd_dev, uint8_t ep)

examples/stm32/f1/lisa-m-1/usb_dfu/usbdfu.c

@@ -174,39 +174,38 @@ static void usbdfu_getstatus_complete(usbd_device *usbd_dev, struct usb_setup_da
 	}
 }
 
-static int usbdfu_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
+static enum usbd_request_return_codes usbdfu_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
 		uint16_t *len, void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
 {
 	(void)usbd_dev;
 
 	if ((req->bmRequestType & 0x7F) != 0x21)
-		return 0; /* Only accept class request. */
+		return USBD_REQ_NOTSUPP; /* Only accept class request. */
 
 	switch (req->bRequest) {
 	case DFU_DNLOAD:
 		if ((len == NULL) || (*len == 0)) {
 			usbdfu_state = STATE_DFU_MANIFEST_SYNC;
-			return 1;
 		} else {
 			/* Copy download data for use on GET_STATUS. */
 			prog.blocknum = req->wValue;
 			prog.len = *len;
 			memcpy(prog.buf, *buf, *len);
 			usbdfu_state = STATE_DFU_DNLOAD_SYNC;
-			return 1;
 		}
+		return USBD_REQ_HANDLED;
 	case DFU_CLRSTATUS:
 		/* Clear error and return to dfuIDLE. */
 		if (usbdfu_state == STATE_DFU_ERROR)
 			usbdfu_state = STATE_DFU_IDLE;
-		return 1;
+		return USBD_REQ_HANDLED;
 	case DFU_ABORT:
 		/* Abort returns to dfuIDLE state. */
 		usbdfu_state = STATE_DFU_IDLE;
-		return 1;
+		return USBD_REQ_HANDLED;
 	case DFU_UPLOAD:
 		/* Upload not supported for now. */
-		return 0;
+		return USBD_REQ_NOTSUPP;
 	case DFU_GETSTATUS: {
 		uint32_t bwPollTimeout = 0; /* 24-bit integer in DFU class spec */
 		(*buf)[0] = usbdfu_getstatus(&bwPollTimeout);
@@ -217,16 +216,16 @@ static int usbdfu_control_request(usbd_device *usbd_dev, struct usb_setup_data *
 		(*buf)[5] = 0; /* iString not used here */
 		*len = 6;
 		*complete = usbdfu_getstatus_complete;
-		return 1;
+		return USBD_REQ_HANDLED;
 		}
 	case DFU_GETSTATE:
 		/* Return state with no state transision. */
 		*buf[0] = usbdfu_state;
 		*len = 1;
-		return 1;
+		return USBD_REQ_HANDLED;
 	}
 
-	return 0;
+	return USBD_REQ_NOTSUPP;
 }
 
 static void usbdfu_set_config(usbd_device *usbd_dev, uint16_t wValue)

examples/stm32/f1/lisa-m-1/usb_hid/usbhid.c

@@ -214,13 +214,13 @@ static enum usbd_request_return_codes hid_control_request(usbd_device *dev, stru
 	if((req->bmRequestType != 0x81) ||
 	   (req->bRequest != USB_REQ_GET_DESCRIPTOR) ||
 	   (req->wValue != 0x2200))
-		return 0;
+		return USBD_REQ_NOTSUPP;
 
 	/* Handle the HID report descriptor. */
 	*buf = (uint8_t *)hid_report_descriptor;
 	*len = sizeof(hid_report_descriptor);
 
-	return 1;
+	return USBD_REQ_HANDLED;
 }
 
 #ifdef INCLUDE_DFU_INTERFACE
@@ -244,11 +244,11 @@ static enum usbd_request_return_codes dfu_control_request(usbd_device *dev, stru
 	(void)dev;
 
 	if ((req->bmRequestType != 0x21) || (req->bRequest != DFU_DETACH))
-		return 0; /* Only accept class request. */
+		return USBD_REQ_NOTSUPP; /* Only accept class request. */
 
 	*complete = dfu_detach_complete;
 
-	return 1;
+	return USBD_REQ_HANDLED;
 }
 #endif
 

examples/stm32/f1/other/usb_cdcacm/cdcacm.c

@@ -166,7 +166,7 @@ static const char *usb_strings[] = {
 /* Buffer to be used for control requests. */
 uint8_t usbd_control_buffer[128];
 
-static int cdcacm_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
+static enum usbd_request_return_codes cdcacm_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
 		uint16_t *len, void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
 {
 	(void)complete;
@@ -192,15 +192,15 @@ static int cdcacm_control_request(usbd_device *usbd_dev, struct usb_setup_data *
 		local_buf[8] = req->wValue & 3;
 		local_buf[9] = 0;
 		// usbd_ep_write_packet(0x83, buf, 10);
-		return 1;
+		return USBD_REQ_HANDLED;
 		}
 	case USB_CDC_REQ_SET_LINE_CODING: 
 		if(*len < sizeof(struct usb_cdc_line_coding))
-			return 0;
+			return USBD_REQ_NOTSUPP;
 
-		return 1;
+		return USBD_REQ_HANDLED;
 	}
-	return 0;
+	return USBD_REQ_NOTSUPP;
 }
 
 static void cdcacm_data_rx_cb(usbd_device *usbd_dev, uint8_t ep)

examples/stm32/f1/other/usb_dfu/usbdfu.c

@@ -174,39 +174,38 @@ static void usbdfu_getstatus_complete(usbd_device *usbd_dev, struct usb_setup_da
 	}
 }
 
-static int usbdfu_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
+static enum usbd_request_return_codes usbdfu_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
 		uint16_t *len, void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
 {
 	(void)usbd_dev;
 
 	if ((req->bmRequestType & 0x7F) != 0x21)
-		return 0; /* Only accept class request. */
+		return USBD_REQ_NOTSUPP; /* Only accept class request. */
 
 	switch (req->bRequest) {
 	case DFU_DNLOAD:
 		if ((len == NULL) || (*len == 0)) {
 			usbdfu_state = STATE_DFU_MANIFEST_SYNC;
-			return 1;
 		} else {
 			/* Copy download data for use on GET_STATUS. */
 			prog.blocknum = req->wValue;
 			prog.len = *len;
 			memcpy(prog.buf, *buf, *len);
 			usbdfu_state = STATE_DFU_DNLOAD_SYNC;
-			return 1;
 		}
+		return USBD_REQ_HANDLED;
 	case DFU_CLRSTATUS:
 		/* Clear error and return to dfuIDLE. */
 		if (usbdfu_state == STATE_DFU_ERROR)
 			usbdfu_state = STATE_DFU_IDLE;
-		return 1;
+		return USBD_REQ_HANDLED;
 	case DFU_ABORT:
 		/* Abort returns to dfuIDLE state. */
 		usbdfu_state = STATE_DFU_IDLE;
-		return 1;
+		return USBD_REQ_HANDLED;
 	case DFU_UPLOAD:
 		/* Upload not supported for now. */
-		return 0;
+		return USBD_REQ_NOTSUPP;
 	case DFU_GETSTATUS: {
 		uint32_t bwPollTimeout = 0; /* 24-bit integer in DFU class spec */
 		(*buf)[0] = usbdfu_getstatus(&bwPollTimeout);
@@ -217,16 +216,16 @@ static int usbdfu_control_request(usbd_device *usbd_dev, struct usb_setup_data *
 		(*buf)[5] = 0; /* iString not used here */
 		*len = 6;
 		*complete = usbdfu_getstatus_complete;
-		return 1;
+		return USBD_REQ_HANDLED;
 		}
 	case DFU_GETSTATE:
 		/* Return state with no state transision. */
 		*buf[0] = usbdfu_state;
 		*len = 1;
-		return 1;
+		return USBD_REQ_HANDLED;
 	}
 
-	return 0;
+	return USBD_REQ_NOTSUPP;
 }
 
 static void usbdfu_set_config(usbd_device *usbd_dev, uint16_t wValue)

examples/stm32/f1/other/usb_hid/usbhid.c

@@ -201,7 +201,7 @@ static const char *usb_strings[] = {
 /* Buffer to be used for control requests. */
 uint8_t usbd_control_buffer[128];
 
-static int hid_control_request(usbd_device *dev, struct usb_setup_data *req, uint8_t **buf, uint16_t *len,
+static enum usbd_request_return_codes hid_control_request(usbd_device *dev, struct usb_setup_data *req, uint8_t **buf, uint16_t *len,
 			void (**complete)(usbd_device *, struct usb_setup_data *))
 {
 	(void)complete;
@@ -210,13 +210,13 @@ static int hid_control_request(usbd_device *dev, struct usb_setup_data *req, uin
 	if((req->bmRequestType != 0x81) ||
 	   (req->bRequest != USB_REQ_GET_DESCRIPTOR) ||
 	   (req->wValue != 0x2200))
-		return 0;
+		return USBD_REQ_NOTSUPP;
 
 	/* Handle the HID report descriptor. */
 	*buf = (uint8_t *)hid_report_descriptor;
 	*len = sizeof(hid_report_descriptor);
 
-	return 1;
+	return USBD_REQ_HANDLED;
 }
 
 #ifdef INCLUDE_DFU_INTERFACE
@@ -231,7 +231,7 @@ static void dfu_detach_complete(usbd_device *dev, struct usb_setup_data *req)
 	scb_reset_core();
 }
 
-static int dfu_control_request(usbd_device *dev, struct usb_setup_data *req, uint8_t **buf, uint16_t *len,
+static enum usbd_request_return_codes dfu_control_request(usbd_device *dev, struct usb_setup_data *req, uint8_t **buf, uint16_t *len,
 			void (**complete)(usbd_device *, struct usb_setup_data *))
 {
 	(void)buf;
@@ -239,11 +239,11 @@ static int dfu_control_request(usbd_device *dev, struct usb_setup_data *req, uin
 	(void)dev;
 
 	if ((req->bmRequestType != 0x21) || (req->bRequest != DFU_DETACH))
-		return 0; /* Only accept class request. */
+		return USBD_REQ_NOTSUPP; /* Only accept class request. */
 
 	*complete = dfu_detach_complete;
 
-	return 1;
+	return USBD_REQ_HANDLED;
 }
 #endif
 

examples/stm32/f1/stm32-h103/usb_cdcacm/cdcacm.c

@@ -166,7 +166,7 @@ static const char *usb_strings[] = {
 /* Buffer to be used for control requests. */
 uint8_t usbd_control_buffer[128];
 
-static int cdcacm_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
+static enum usbd_request_return_codes cdcacm_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
 		uint16_t *len, void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
 {
 	(void)complete;
@@ -192,14 +192,14 @@ static int cdcacm_control_request(usbd_device *usbd_dev, struct usb_setup_data *
 		local_buf[8] = req->wValue & 3;
 		local_buf[9] = 0;
 		// usbd_ep_write_packet(0x83, buf, 10);
-		return 1;
+		return USBD_REQ_HANDLED;
 		}
 	case USB_CDC_REQ_SET_LINE_CODING:
 		if (*len < sizeof(struct usb_cdc_line_coding))
-			return 0;
+			return USBD_REQ_NOTSUPP;
-		return 1;
+		return USBD_REQ_HANDLED;
 	}
-	return 0;
+	return USBD_REQ_NOTSUPP;
 }
 
 static void cdcacm_data_rx_cb(usbd_device *usbd_dev, uint8_t ep)

examples/stm32/f1/stm32-h103/usb_dfu/usbdfu.c

@@ -176,37 +176,36 @@ static void usbdfu_getstatus_complete(usbd_device *usbd_dev, struct usb_setup_da
 	}
 }
 
-static int usbdfu_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
+static enum usbd_request_return_codes usbdfu_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
 		uint16_t *len, void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
 {
 	if ((req->bmRequestType & 0x7F) != 0x21)
-		return 0; /* Only accept class request. */
+		return USBD_REQ_NOTSUPP; /* Only accept class request. */
 
 	switch (req->bRequest) {
 	case DFU_DNLOAD:
 		if ((len == NULL) || (*len == 0)) {
 			usbdfu_state = STATE_DFU_MANIFEST_SYNC;
-			return 1;
 		} else {
 			/* Copy download data for use on GET_STATUS. */
 			prog.blocknum = req->wValue;
 			prog.len = *len;
 			memcpy(prog.buf, *buf, *len);
 			usbdfu_state = STATE_DFU_DNLOAD_SYNC;
-			return 1;
 		}
+		return USBD_REQ_HANDLED;
 	case DFU_CLRSTATUS:
 		/* Clear error and return to dfuIDLE. */
 		if (usbdfu_state == STATE_DFU_ERROR)
 			usbdfu_state = STATE_DFU_IDLE;
-		return 1;
+		return USBD_REQ_HANDLED;
 	case DFU_ABORT:
 		/* Abort returns to dfuIDLE state. */
 		usbdfu_state = STATE_DFU_IDLE;
-		return 1;
+		return USBD_REQ_HANDLED;
 	case DFU_UPLOAD:
 		/* Upload not supported for now. */
-		return 0;
+		return USBD_REQ_NOTSUPP;
 	case DFU_GETSTATUS: {
 		uint32_t bwPollTimeout = 0; /* 24-bit integer in DFU class spec */
 		(*buf)[0] = usbdfu_getstatus(usbd_dev, &bwPollTimeout);
@@ -217,16 +216,16 @@ static int usbdfu_control_request(usbd_device *usbd_dev, struct usb_setup_data *
 		(*buf)[5] = 0; /* iString not used here */
 		*len = 6;
 		*complete = usbdfu_getstatus_complete;
-		return 1;
+		return USBD_REQ_HANDLED;
 		}
 	case DFU_GETSTATE:
 		/* Return state with no state transision. */
 		*buf[0] = usbdfu_state;
 		*len = 1;
-		return 1;
+		return USBD_REQ_HANDLED;
 	}
 
-	return 0;
+	return USBD_REQ_NOTSUPP;
 }
 
 static void usbdfu_set_config(usbd_device *usbd_dev, uint16_t wValue)

examples/stm32/f1/stm32-h103/usb_iap/usbiap.c

@@ -176,37 +176,36 @@ static void usbdfu_getstatus_complete(usbd_device *usbd_dev, struct usb_setup_da
 	}
 }
 
-static int usbdfu_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
+static enum usbd_request_return_codes usbdfu_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
 		uint16_t *len, void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
 {
 	if ((req->bmRequestType & 0x7F) != 0x21)
-		return 0; /* Only accept class request. */
+		return USBD_REQ_NOTSUPP; /* Only accept class request. */
 
 	switch (req->bRequest) {
 	case DFU_DNLOAD:
 		if ((len == NULL) || (*len == 0)) {
 			usbdfu_state = STATE_DFU_MANIFEST_SYNC;
-			return 1;
 		} else {
 			/* Copy download data for use on GET_STATUS. */
 			prog.blocknum = req->wValue;
 			prog.len = *len;
 			memcpy(prog.buf, *buf, *len);
 			usbdfu_state = STATE_DFU_DNLOAD_SYNC;
-			return 1;
 		}
+		return USBD_REQ_HANDLED;
 	case DFU_CLRSTATUS:
 		/* Clear error and return to dfuIDLE. */
 		if (usbdfu_state == STATE_DFU_ERROR)
 			usbdfu_state = STATE_DFU_IDLE;
-		return 1;
+		return USBD_REQ_HANDLED;
 	case DFU_ABORT:
 		/* Abort returns to dfuIDLE state. */
 		usbdfu_state = STATE_DFU_IDLE;
-		return 1;
+		return USBD_REQ_HANDLED;
 	case DFU_UPLOAD:
 		/* Upload not supported for now. */
-		return 0;
+		return USBD_REQ_NOTSUPP;
 	case DFU_GETSTATUS: {
 		uint32_t bwPollTimeout = 0; /* 24-bit integer in DFU class spec */
 		(*buf)[0] = usbdfu_getstatus(usbd_dev, &bwPollTimeout);
@@ -217,16 +216,16 @@ static int usbdfu_control_request(usbd_device *usbd_dev, struct usb_setup_data *
 		(*buf)[5] = 0; /* iString not used here */
 		*len = 6;
 		*complete = usbdfu_getstatus_complete;
-		return 1;
+		return USBD_REQ_HANDLED;
 		}
 	case DFU_GETSTATE:
 		/* Return state with no state transision. */
 		*buf[0] = usbdfu_state;
 		*len = 1;
-		return 1;
+		return USBD_REQ_HANDLED;
 	}
 
-	return 0;
+	return USBD_REQ_NOTSUPP;
 }
 
 static void usbdfu_set_config(usbd_device *usbd_dev, uint16_t wValue)

examples/stm32/f1/stm32-h107/usb_simple/usb_simple.c

@@ -77,7 +77,7 @@ const char *usb_strings[] = {
 /* Buffer to be used for control requests. */
 uint8_t usbd_control_buffer[128];
 
-static int simple_control_callback(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
+static enum usbd_request_return_codes simple_control_callback(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
 		uint16_t *len, void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
 {
 	(void)buf;
@@ -86,14 +86,14 @@ static int simple_control_callback(usbd_device *usbd_dev, struct usb_setup_data
 	(void)usbd_dev;
 
 	if (req->bmRequestType != 0x40)
-		return 0; /* Only accept vendor request. */
+		return USBD_REQ_NOTSUPP; /* Only accept vendor request. */
 
 	if (req->wValue & 1)
 		gpio_set(GPIOC, GPIO6);
 	else
 		gpio_clear(GPIOC, GPIO6);
 
-	return 1;
+	return USBD_REQ_HANDLED;
 }
 
 static void usb_set_config_cb(usbd_device *usbd_dev, uint16_t wValue)

examples/stm32/f1/stm32-maple/usb_cdcacm/cdcacm.c

@@ -167,7 +167,7 @@ static const char *usb_strings[] = {
 /* Buffer to be used for control requests. */
 uint8_t usbd_control_buffer[128];
 
-static int cdcacm_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
+static enum usbd_request_return_codes cdcacm_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
 		uint16_t *len, void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
 {
 	(void)complete;
@@ -193,14 +193,14 @@ static int cdcacm_control_request(usbd_device *usbd_dev, struct usb_setup_data *
 		local_buf[8] = req->wValue & 3;
 		local_buf[9] = 0;
 		// usbd_ep_write_packet(0x83, buf, 10);
-		return 1;
+		return USBD_REQ_HANDLED;
 		}
 	case USB_CDC_REQ_SET_LINE_CODING:
 		if (*len < sizeof(struct usb_cdc_line_coding))
-			return 0;
+			return USBD_REQ_NOTSUPP;
-		return 1;
+		return USBD_REQ_HANDLED;
 	}
-	return 0;
+	return USBD_REQ_NOTSUPP;
 }
 
 static void cdcacm_data_rx_cb(usbd_device *usbd_dev, uint8_t ep)

examples/stm32/f1/waveshare-open103r/usbserial/usbserial.c

@@ -205,13 +205,13 @@ static enum usbd_request_return_codes cdcacm_control_request(usbd_device *usbd_d
     local_buf[8] = req->wValue & 3;
     local_buf[9] = 0;
     // usbd_ep_write_packet(0x83, buf, 10);
-    return 1;
+    return USBD_REQ_HANDLED;
   }
   case USB_CDC_REQ_SET_LINE_CODING: 
     if(*len < sizeof(struct usb_cdc_line_coding)) {
-      return 0;
+      return USBD_REQ_NOTSUPP;
     }
-    return 1;
+    return USBD_REQ_HANDLED;
   }
   return 0;
 }

examples/stm32/f3/stm32f3-discovery/usb_cdcacm/cdcacm.c

@@ -192,14 +192,14 @@ static enum usbd_request_return_codes cdcacm_control_request(usbd_device *usbd_d
 		local_buf[8] = req->wValue & 3;
 		local_buf[9] = 0;
 		// usbd_ep_write_packet(0x83, buf, 10);
-		return 1;
+		return USBD_REQ_HANDLED;
 		}
 	case USB_CDC_REQ_SET_LINE_CODING:
 		if (*len < sizeof(struct usb_cdc_line_coding))
-			return 0;
+			return USBD_REQ_NOTSUPP;
-		return 1;
+		return USBD_REQ_HANDLED;
 	}
-	return 0;
+	return USBD_REQ_NOTSUPP;
 }
 
 static void cdcacm_data_rx_cb(usbd_device *usbd_dev, uint8_t ep)

examples/stm32/f4/stm32f4-discovery/usb_cdcacm/cdcacm.c

@@ -167,7 +167,7 @@ static const char * usb_strings[] = {
 /* Buffer to be used for control requests. */
 uint8_t usbd_control_buffer[128];
 
-static int cdcacm_control_request(usbd_device *usbd_dev,
+static enum usbd_request_return_codes cdcacm_control_request(usbd_device *usbd_dev,
 	struct usb_setup_data *req, uint8_t **buf, uint16_t *len,
 	void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
 {
@@ -182,16 +182,16 @@ static int cdcacm_control_request(usbd_device *usbd_dev,
 		 * even though it's optional in the CDC spec, and we don't
 		 * advertise it in the ACM functional descriptor.
 		 */
-		return 1;
+		return USBD_REQ_HANDLED;
 		}
 	case USB_CDC_REQ_SET_LINE_CODING:
 		if (*len < sizeof(struct usb_cdc_line_coding)) {
-			return 0;
+			return USBD_REQ_NOTSUPP;
 		}
 
-		return 1;
+		return USBD_REQ_HANDLED;
 	}
-	return 0;
+	return USBD_REQ_NOTSUPP;
 }
 
 static void cdcacm_data_rx_cb(usbd_device *usbd_dev, uint8_t ep)

examples/stm32/f4/stm32f429i-discovery/usb_cdcacm/cdcacm.c

@@ -168,7 +168,7 @@ static const char *usb_strings[] = {
 /* Buffer to be used for control requests. */
 uint8_t usbd_control_buffer[128];
 
-static int cdcacm_control_request(usbd_device *usbd_dev,
+static enum usbd_request_return_codes cdcacm_control_request(usbd_device *usbd_dev,
 	struct usb_setup_data *req, uint8_t **buf, uint16_t *len,
 	void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
 {
@@ -183,16 +183,16 @@ static int cdcacm_control_request(usbd_device *usbd_dev,
 		 * even though it's optional in the CDC spec, and we don't
 		 * advertise it in the ACM functional descriptor.
 		 */
-		return 1;
+		return USBD_REQ_HANDLED;
 		}
 	case USB_CDC_REQ_SET_LINE_CODING:
 		if (*len < sizeof(struct usb_cdc_line_coding)) {
-			return 0;
+			return USBD_REQ_NOTSUPP;
 		}
 
-		return 1;
+		return USBD_REQ_HANDLED;
 	}
-	return 0;
+	return USBD_REQ_NOTSUPP;
 }
 
 static void cdcacm_data_rx_cb(usbd_device *usbd_dev, uint8_t ep)

examples/tiva/lm4f/stellaris-ek-lm4f120xl/usb_to_serial_cdcacm/usb_cdcacm.c

@@ -173,7 +173,7 @@ usbd_device *acm_dev;
 uint8_t usbd_control_buffer[128];
 extern usbd_driver lm4f_usb_driver;
 
-static int cdcacm_control_request(usbd_device * usbd_dev,
+static enum usbd_request_return_codes cdcacm_control_request(usbd_device * usbd_dev,
 				  struct usb_setup_data *req, uint8_t ** buf,
 				  uint16_t * len,
 				  void (**complete) (usbd_device * usbd_dev,
@@ -199,13 +199,13 @@ static int cdcacm_control_request(usbd_device * usbd_dev,
 
 			glue_set_line_state_cb(dtr, rts);
 
-			return 1;
+			return USBD_REQ_HANDLED;
 		}
 	case USB_CDC_REQ_SET_LINE_CODING:{
 			struct usb_cdc_line_coding *coding;
 
 			if (*len < sizeof(struct usb_cdc_line_coding))
-				return 0;
+				return USBD_REQ_NOTSUPP;
 
 			coding = (struct usb_cdc_line_coding *)*buf;
 			return glue_set_line_coding_cb(coding->dwDTERate,
@@ -214,7 +214,7 @@ static int cdcacm_control_request(usbd_device * usbd_dev,
 						       coding->bCharFormat);
 		}
 	}
-	return 0;
+	return USBD_REQ_NOTSUPP;
 }
 
 static void cdcacm_data_rx_cb(usbd_device * usbd_dev, uint8_t ep)