staging: comedi: usbdux: request firmware synchronously

Change the request_firmware_nowait() to a request_firmware() so
that the usb_driver (*probe) can continue with the comedi_driver
(*auto_attach).

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/usbdux.c

@@ -2364,40 +2364,12 @@ static struct comedi_driver usbdux_driver = {
 	.detach		= usbdux_detach,
 };
 
-static void usbdux_firmware_request_complete_handler(const struct firmware *fw,
-						     void *context)
-{
-	struct usbduxsub *usbduxsub_tmp = context;
-	struct usb_interface *uinterf = usbduxsub_tmp->interface;
-	int ret;
-
-	if (fw == NULL) {
-		dev_err(&uinterf->dev,
-			"Firmware complete handler without firmware!\n");
-		return;
-	}
-
-	/*
-	 * we need to upload the firmware here because fw will be
-	 * freed once we've left this function
-	 */
-	ret = firmware_upload(usbduxsub_tmp, fw->data, fw->size);
-
-	if (ret) {
-		dev_err(&uinterf->dev,
-			"Could not upload firmware (err=%d)\n", ret);
-		goto out;
-	}
-	comedi_usb_auto_config(uinterf, &usbdux_driver, 0);
- out:
-	release_firmware(fw);
-}
-
 static int usbdux_usb_probe(struct usb_interface *uinterf,
 			    const struct usb_device_id *id)
 {
 	struct usb_device *udev = interface_to_usbdev(uinterf);
 	struct device *dev = &uinterf->dev;
+	const struct firmware *fw;
 	int i;
 	int index;
 	int ret;
@@ -2617,23 +2589,15 @@ static int usbdux_usb_probe(struct usb_interface *uinterf,
 	usbduxsub[index].probed = 1;
 	up(&start_stop_sem);
 
-	ret = request_firmware_nowait(THIS_MODULE,
-				      FW_ACTION_HOTPLUG,
-				      FIRMWARE,
-				      &udev->dev,
-				      GFP_KERNEL,
-				      usbduxsub + index,
-				      usbdux_firmware_request_complete_handler);
-
-	if (ret) {
-		dev_err(dev, "Could not load firmware (err=%d)\n", ret);
-		return ret;
+	ret = request_firmware(&fw, FIRMWARE, &udev->dev);
+	if (ret == 0) {
+		ret = firmware_upload(&usbduxsub[index], fw->data, fw->size);
+		release_firmware(fw);
 	}
+	if (ret < 0)
+		return ret;
 
-	dev_info(dev, "comedi_: usbdux%d "
-		 "has been successfully initialised.\n", index);
-	/* success */
-	return 0;
+	return comedi_usb_auto_config(uinterf, &usbdux_driver, 0);
 }
 
 static void usbdux_usb_disconnect(struct usb_interface *intf)