netdev - [PATCH net-next 33/54] net: ethernet: microchip: Convert to platform remove callback returning void

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Message-Id: <20230918204227.1316886-34-u.kleine-koenig@pengutronix.de>
Date: Mon, 18 Sep 2023 22:42:05 +0200
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: Horatiu Vultur <horatiu.vultur@...rochip.com>,
	UNGLinuxDriver@...rochip.com,
	Lars Povlsen <lars.povlsen@...rochip.com>,
	Steen Hegelund <Steen.Hegelund@...rochip.com>,
	Daniel Machon <daniel.machon@...rochip.com>,
	Shang XiaoJing <shangxiaojing@...wei.com>,
	Qiheng Lin <linqiheng@...wei.com>,
	netdev@...r.kernel.org,
	kernel@...gutronix.de,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH net-next 33/54] net: ethernet: microchip: 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() is renamed to .remove().

Trivially convert these drivers from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
 drivers/net/ethernet/microchip/lan966x/lan966x_main.c | 6 ++----
 drivers/net/ethernet/microchip/sparx5/sparx5_main.c   | 6 ++----
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
index 0d6e79af2410..8e4101628fbd 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
@@ -1261,7 +1261,7 @@ static int lan966x_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int lan966x_remove(struct platform_device *pdev)
+static void lan966x_remove(struct platform_device *pdev)
 {
 	struct lan966x *lan966x = platform_get_drvdata(pdev);
 
@@ -1280,13 +1280,11 @@ static int lan966x_remove(struct platform_device *pdev)
 	lan966x_ptp_deinit(lan966x);
 
 	debugfs_remove_recursive(lan966x->debugfs_root);
-
-	return 0;
 }
 
 static struct platform_driver lan966x_driver = {
 	.probe = lan966x_probe,
-	.remove = lan966x_remove,
+	.remove_new = lan966x_remove,
 	.driver = {
 		.name = "lan966x-switch",
 		.of_match_table = lan966x_match,
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
index dc9af480bfea..d1f7fc8b1b71 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
@@ -911,7 +911,7 @@ static int mchp_sparx5_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int mchp_sparx5_remove(struct platform_device *pdev)
+static void mchp_sparx5_remove(struct platform_device *pdev)
 {
 	struct sparx5 *sparx5 = platform_get_drvdata(pdev);
 
@@ -931,8 +931,6 @@ static int mchp_sparx5_remove(struct platform_device *pdev)
 	/* Unregister netdevs */
 	sparx5_unregister_notifier_blocks(sparx5);
 	destroy_workqueue(sparx5->mact_queue);
-
-	return 0;
 }
 
 static const struct of_device_id mchp_sparx5_match[] = {
@@ -943,7 +941,7 @@ MODULE_DEVICE_TABLE(of, mchp_sparx5_match);
 
 static struct platform_driver mchp_sparx5_driver = {
 	.probe = mchp_sparx5_probe,
-	.remove = mchp_sparx5_remove,
+	.remove_new = mchp_sparx5_remove,
 	.driver = {
 		.name = "sparx5-switch",
 		.of_match_table = mchp_sparx5_match,
-- 
2.40.1