linux-kernel - [PATCH 39/40] soc/ti: wkup_m3_ipc: Convert to platform remove callback returning void

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Message-Id: <20230925095532.1984344-40-u.kleine-koenig@pengutronix.de>
Date:   Mon, 25 Sep 2023 11:55:30 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Nishanth Menon <nm@...com>, Santosh Shilimkar <ssantosh@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kernel@...gutronix.de
Subject: [PATCH 39/40] soc/ti: wkup_m3_ipc: 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 this driver 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/soc/ti/wkup_m3_ipc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/soc/ti/wkup_m3_ipc.c b/drivers/soc/ti/wkup_m3_ipc.c
index 3aff106fc11a..6a1c6b34c414 100644
--- a/drivers/soc/ti/wkup_m3_ipc.c
+++ b/drivers/soc/ti/wkup_m3_ipc.c
@@ -713,7 +713,7 @@ static int wkup_m3_ipc_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int wkup_m3_ipc_remove(struct platform_device *pdev)
+static void wkup_m3_ipc_remove(struct platform_device *pdev)
 {
 	wkup_m3_ipc_dbg_destroy(m3_ipc_state);
 
@@ -723,8 +723,6 @@ static int wkup_m3_ipc_remove(struct platform_device *pdev)
 	rproc_put(m3_ipc_state->rproc);
 
 	m3_ipc_state = NULL;
-
-	return 0;
 }
 
 static int __maybe_unused wkup_m3_ipc_suspend(struct device *dev)
@@ -760,7 +758,7 @@ MODULE_DEVICE_TABLE(of, wkup_m3_ipc_of_match);
 
 static struct platform_driver wkup_m3_ipc_driver = {
 	.probe = wkup_m3_ipc_probe,
-	.remove = wkup_m3_ipc_remove,
+	.remove_new = wkup_m3_ipc_remove,
 	.driver = {
 		.name = "wkup_m3_ipc",
 		.of_match_table = wkup_m3_ipc_of_match,
-- 
2.40.1