V4L/DVB (10455): radio-mr800: codingstyle cleanups

Cleanups of many if-check constructions.
Signed-off-by: Alexey Klimov <klimov.linux@gmail.com>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/radio/radio-mr800.c

@@ -375,13 +375,15 @@ static int vidioc_s_frequency(struct file *file, void *priv,
 				struct v4l2_frequency *f)
 {
 	struct amradio_device *radio = video_get_drvdata(video_devdata(file));
+	int retval;
 
 	/* safety check */
 	if (radio->removed)
 		return -EIO;
 
 	radio->curfreq = f->frequency;
-	if (amradio_setfreq(radio, radio->curfreq) < 0)
+	retval = amradio_setfreq(radio, radio->curfreq);
+	if (retval < 0)
 		amradio_dev_warn(&radio->videodev->dev,
 			"set frequency failed\n");
 	return 0;
@@ -440,6 +442,7 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
 				struct v4l2_control *ctrl)
 {
 	struct amradio_device *radio = video_get_drvdata(video_devdata(file));
+	int retval;
 
 	/* safety check */
 	if (radio->removed)
@@ -448,13 +451,15 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
 		if (ctrl->value) {
-			if (amradio_stop(radio) < 0) {
+			retval = amradio_stop(radio);
+			if (retval < 0) {
 				amradio_dev_warn(&radio->videodev->dev,
 					"amradio_stop failed\n");
 				return -1;
 			}
 		} else {
-			if (amradio_start(radio) < 0) {
+			retval = amradio_start(radio);
+			if (retval < 0) {
 				amradio_dev_warn(&radio->videodev->dev,
 					"amradio_start failed\n");
 				return -1;
@@ -505,20 +510,24 @@ static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 static int usb_amradio_open(struct file *file)
 {
 	struct amradio_device *radio = video_get_drvdata(video_devdata(file));
+	int retval;
 
 	lock_kernel();
 
 	radio->users = 1;
 	radio->muted = 1;
 
-	if (amradio_start(radio) < 0) {
+	retval = amradio_start(radio);
+	if (retval < 0) {
 		amradio_dev_warn(&radio->videodev->dev,
 			"radio did not start up properly\n");
 		radio->users = 0;
 		unlock_kernel();
 		return -EIO;
 	}
-	if (amradio_setfreq(radio, radio->curfreq) < 0)
+
+	retval = amradio_setfreq(radio, radio->curfreq);
+	if (retval < 0)
 		amradio_dev_warn(&radio->videodev->dev,
 			"set frequency failed\n");
 
@@ -551,8 +560,10 @@ static int usb_amradio_close(struct file *file)
 static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message)
 {
 	struct amradio_device *radio = usb_get_intfdata(intf);
+	int retval;
 
-	if (amradio_stop(radio) < 0)
+	retval = amradio_stop(radio);
+	if (retval < 0)
 		dev_warn(&intf->dev, "amradio_stop failed\n");
 
 	dev_info(&intf->dev, "going into suspend..\n");
@@ -564,8 +575,10 @@ static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message)
 static int usb_amradio_resume(struct usb_interface *intf)
 {
 	struct amradio_device *radio = usb_get_intfdata(intf);
+	int retval;
 
-	if (amradio_start(radio) < 0)
+	retval = amradio_start(radio);
+	if (retval < 0)
 		dev_warn(&intf->dev, "amradio_start failed\n");
 
 	dev_info(&intf->dev, "coming out of suspend..\n");
@@ -616,16 +629,16 @@ static struct video_device amradio_videodev_template = {
 	.release	= usb_amradio_device_release,
 };
 
-/* check if the device is present and register with v4l and
-usb if it is */
+/* check if the device is present and register with v4l and usb if it is */
 static int usb_amradio_probe(struct usb_interface *intf,
 				const struct usb_device_id *id)
 {
 	struct amradio_device *radio;
+	int retval;
 
 	radio = kmalloc(sizeof(struct amradio_device), GFP_KERNEL);
 
-	if (!(radio))
+	if (!radio)
 		return -ENOMEM;
 
 	radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL);
@@ -654,7 +667,8 @@ static int usb_amradio_probe(struct usb_interface *intf,
 	mutex_init(&radio->lock);
 
 	video_set_drvdata(radio->videodev, radio);
-	if (video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr)) {
+	retval = video_register_device(radio->videodev,	VFL_TYPE_RADIO,	radio_nr);
+	if (retval < 0) {
 		dev_warn(&intf->dev, "could not register video device\n");
 		video_device_release(radio->videodev);
 		kfree(radio->buffer);