ALSA: line6: Remove CHECK_RETURN macro

Such a macro doesn't improve readability.
Tested-by: Chris Rorvick <chris@rorvick.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/line6/driver.h

@@ -48,13 +48,6 @@
 
 #define LINE6_CHANNEL_MASK 0x0f
 
-#define CHECK_RETURN(x)		\
-do {				\
-	err = x;		\
-	if (err < 0)		\
-		return err;	\
-} while (0)
-
 #define CHECK_STARTUP_PROGRESS(x, n)	\
 do {					\
 	if ((x) >= (n))			\

sound/usb/line6/pod.c

@@ -429,9 +429,15 @@ static int pod_create_files2(struct device *dev)
 {
 	int err;
 
-	CHECK_RETURN(device_create_file(dev, &dev_attr_device_id));
-	CHECK_RETURN(device_create_file(dev, &dev_attr_firmware_version));
-	CHECK_RETURN(device_create_file(dev, &dev_attr_serial_number));
+	err = device_create_file(dev, &dev_attr_device_id);
+	if (err < 0)
+		return err;
+	err = device_create_file(dev, &dev_attr_firmware_version);
+	if (err < 0)
+		return err;
+	err = device_create_file(dev, &dev_attr_serial_number);
+	if (err < 0)
+		return err;
 	return 0;
 }
 

sound/usb/line6/toneport.c

@@ -431,10 +431,12 @@ static int toneport_init(struct usb_interface *interface,
 	line6_read_data(line6, 0x80c2, &toneport->firmware_version, 1);
 
 	if (toneport_has_led(toneport->type)) {
-		CHECK_RETURN(device_create_file
-			     (&interface->dev, &dev_attr_led_red));
-		CHECK_RETURN(device_create_file
-			     (&interface->dev, &dev_attr_led_green));
+		err = device_create_file(&interface->dev, &dev_attr_led_red);
+		if (err < 0)
+			return err;
+		err = device_create_file(&interface->dev, &dev_attr_led_green);
+		if (err < 0)
+			return err;
 	}
 
 	toneport_setup(toneport);