linux-kernel - [PATCH 04/11] firmware: imx-dsp: Convert to platform remove callback returning void

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Message-ID:  <f4cc1ffe30b837d5eab96f2924f51999dfa9f671.1703693980.git.u.kleine-koenig@pengutronix.de>
Date: Wed, 27 Dec 2023 17:26:28 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Daniel Baluta <daniel.baluta@....com>,
	Thierry Reding <treding@...dia.com>,
	Sudeep Holla <sudeep.holla@....com>,
	Hao Ge <gehao@...inos.cn>,
	Rob Herring <robh@...nel.org>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc: kernel@...gutronix.de,
	Fabio Estevam <festevam@...il.com>,
	NXP Linux Team <linux-imx@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 04/11] firmware: imx-dsp: 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/firmware/imx/imx-dsp.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/firmware/imx/imx-dsp.c b/drivers/firmware/imx/imx-dsp.c
index a48a58e0c61f..01c8ef14eaec 100644
--- a/drivers/firmware/imx/imx-dsp.c
+++ b/drivers/firmware/imx/imx-dsp.c
@@ -160,7 +160,7 @@ static int imx_dsp_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int imx_dsp_remove(struct platform_device *pdev)
+static void imx_dsp_remove(struct platform_device *pdev)
 {
 	struct imx_dsp_chan *dsp_chan;
 	struct imx_dsp_ipc *dsp_ipc;
@@ -173,8 +173,6 @@ static int imx_dsp_remove(struct platform_device *pdev)
 		mbox_free_channel(dsp_chan->ch);
 		kfree(dsp_chan->name);
 	}
-
-	return 0;
 }
 
 static struct platform_driver imx_dsp_driver = {
@@ -182,7 +180,7 @@ static struct platform_driver imx_dsp_driver = {
 		.name = "imx-dsp",
 	},
 	.probe = imx_dsp_probe,
-	.remove = imx_dsp_remove,
+	.remove_new = imx_dsp_remove,
 };
 builtin_platform_driver(imx_dsp_driver);
 
-- 
2.43.0