wifi: mt76: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert the three mt76 drivers from always returning zero in
the remove callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7603/soc.c

@@ -52,15 +52,12 @@ mt76_wmac_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int
-mt76_wmac_remove(struct platform_device *pdev)
+static void mt76_wmac_remove(struct platform_device *pdev)
 {
 	struct mt76_dev *mdev = platform_get_drvdata(pdev);
 	struct mt7603_dev *dev = container_of(mdev, struct mt7603_dev, mt76);
 
 	mt7603_unregister_device(dev);
-
-	return 0;
 }
 
 static const struct of_device_id of_wmac_match[] = {
@@ -74,7 +71,7 @@ MODULE_FIRMWARE(MT7628_FIRMWARE_E2);
 
 struct platform_driver mt76_wmac_driver = {
 	.probe		= mt76_wmac_probe,
-	.remove		= mt76_wmac_remove,
+	.remove_new	= mt76_wmac_remove,
 	.driver = {
 		.name = "mt76_wmac",
 		.of_match_table = of_wmac_match,

drivers/net/wireless/mediatek/mt76/mt7615/soc.c

@@ -45,13 +45,11 @@ static int mt7622_wmac_probe(struct platform_device *pdev)
 	return mt7615_mmio_probe(&pdev->dev, mem_base, irq, mt7615e_reg_map);
 }
 
-static int mt7622_wmac_remove(struct platform_device *pdev)
+static void mt7622_wmac_remove(struct platform_device *pdev)
 {
 	struct mt7615_dev *dev = platform_get_drvdata(pdev);
 
 	mt7615_unregister_device(dev);
-
-	return 0;
 }
 
 static const struct of_device_id mt7622_wmac_of_match[] = {
@@ -65,7 +63,7 @@ struct platform_driver mt7622_wmac_driver = {
 		.of_match_table = mt7622_wmac_of_match,
 	},
 	.probe = mt7622_wmac_probe,
-	.remove = mt7622_wmac_remove,
+	.remove_new = mt7622_wmac_remove,
 };
 
 MODULE_FIRMWARE(MT7622_FIRMWARE_N9);

drivers/net/wireless/mediatek/mt76/mt7915/soc.c

@@ -1282,13 +1282,11 @@ static int mt798x_wmac_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mt798x_wmac_remove(struct platform_device *pdev)
+static void mt798x_wmac_remove(struct platform_device *pdev)
 {
 	struct mt7915_dev *dev = platform_get_drvdata(pdev);
 
 	mt7915_unregister_device(dev);
-
-	return 0;
 }
 
 static const struct of_device_id mt798x_wmac_of_match[] = {
@@ -1305,7 +1303,7 @@ struct platform_driver mt798x_wmac_driver = {
 		.of_match_table = mt798x_wmac_of_match,
 	},
 	.probe = mt798x_wmac_probe,
-	.remove = mt798x_wmac_remove,
+	.remove_new = mt798x_wmac_remove,
 };
 
 MODULE_FIRMWARE(MT7986_FIRMWARE_WA);