iio: hid-sensor: Return proper error if kmemdup fails

Return -ENOMEM instead of 0 if kmemdup fails.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/accel/hid-sensor-accel-3d.c

@@ -306,10 +306,10 @@ static int __devinit hid_accel_3d_probe(struct platform_device *pdev)
 		goto error_free_dev;
 	}
 
-	channels = kmemdup(accel_3d_channels,
-					sizeof(accel_3d_channels),
+	channels = kmemdup(accel_3d_channels, sizeof(accel_3d_channels),
 			   GFP_KERNEL);
 	if (!channels) {
+		ret = -ENOMEM;
 		dev_err(&pdev->dev, "failed to duplicate channels\n");
 		goto error_free_dev;
 	}

drivers/iio/gyro/hid-sensor-gyro-3d.c

@@ -306,10 +306,10 @@ static int __devinit hid_gyro_3d_probe(struct platform_device *pdev)
 		goto error_free_dev;
 	}
 
-	channels = kmemdup(gyro_3d_channels,
-					sizeof(gyro_3d_channels),
+	channels = kmemdup(gyro_3d_channels, sizeof(gyro_3d_channels),
 			   GFP_KERNEL);
 	if (!channels) {
+		ret = -ENOMEM;
 		dev_err(&pdev->dev, "failed to duplicate channels\n");
 		goto error_free_dev;
 	}

drivers/iio/light/hid-sensor-als.c

@@ -272,10 +272,9 @@ static int __devinit hid_als_probe(struct platform_device *pdev)
 		goto error_free_dev;
 	}
 
-	channels = kmemdup(als_channels,
-					sizeof(als_channels),
-					GFP_KERNEL);
+	channels = kmemdup(als_channels, sizeof(als_channels), GFP_KERNEL);
 	if (!channels) {
+		ret = -ENOMEM;
 		dev_err(&pdev->dev, "failed to duplicate channels\n");
 		goto error_free_dev;
 	}

drivers/iio/magnetometer/hid-sensor-magn-3d.c

@@ -307,10 +307,10 @@ static int __devinit hid_magn_3d_probe(struct platform_device *pdev)
 		goto error_free_dev;
 	}
 
-	channels = kmemdup(magn_3d_channels,
-					sizeof(magn_3d_channels),
+	channels = kmemdup(magn_3d_channels, sizeof(magn_3d_channels),
 			   GFP_KERNEL);
 	if (!channels) {
+		ret = -ENOMEM;
 		dev_err(&pdev->dev, "failed to duplicate channels\n");
 		goto error_free_dev;
 	}