From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de> To: David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch> Cc: Chun-Kuang Hu <chunkuang.hu@kernel.org>, Philipp Zabel <p.zabel@pengutronix.de>, Matthias Brugger <matthias.bgg@gmail.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/4] drm/mediatek: Convert to platform remove callback returning void Date: Tue, 9 Apr 2024 19:02:49 +0200 [thread overview] Message-ID: <4a64dfbfbcfdf9b7cd46bc8026223e69a4b453b4.1712681770.git.u.kleine-koenig@pengutronix.de> (raw) In-Reply-To: <cover.1712681770.git.u.kleine-koenig@pengutronix.de> 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@pengutronix.de> --- drivers/gpu/drm/mediatek/mtk_padding.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_padding.c b/drivers/gpu/drm/mediatek/mtk_padding.c index 0d6451c149b6..9f92b720aaae 100644 --- a/drivers/gpu/drm/mediatek/mtk_padding.c +++ b/drivers/gpu/drm/mediatek/mtk_padding.c @@ -137,10 +137,9 @@ static int mtk_padding_probe(struct platform_device *pdev) return 0; } -static int mtk_padding_remove(struct platform_device *pdev) +static void mtk_padding_remove(struct platform_device *pdev) { component_del(&pdev->dev, &mtk_padding_component_ops); - return 0; } static const struct of_device_id mtk_padding_driver_dt_match[] = { @@ -151,7 +150,7 @@ MODULE_DEVICE_TABLE(of, mtk_padding_driver_dt_match); struct platform_driver mtk_padding_driver = { .probe = mtk_padding_probe, - .remove = mtk_padding_remove, + .remove_new = mtk_padding_remove, .driver = { .name = "mediatek-disp-padding", .owner = THIS_MODULE, -- 2.43.0
WARNING: multiple messages have this Message-ID (diff)
From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de> To: David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch> Cc: Chun-Kuang Hu <chunkuang.hu@kernel.org>, Philipp Zabel <p.zabel@pengutronix.de>, Matthias Brugger <matthias.bgg@gmail.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/4] drm/mediatek: Convert to platform remove callback returning void Date: Tue, 9 Apr 2024 19:02:49 +0200 [thread overview] Message-ID: <4a64dfbfbcfdf9b7cd46bc8026223e69a4b453b4.1712681770.git.u.kleine-koenig@pengutronix.de> (raw) In-Reply-To: <cover.1712681770.git.u.kleine-koenig@pengutronix.de> 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@pengutronix.de> --- drivers/gpu/drm/mediatek/mtk_padding.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_padding.c b/drivers/gpu/drm/mediatek/mtk_padding.c index 0d6451c149b6..9f92b720aaae 100644 --- a/drivers/gpu/drm/mediatek/mtk_padding.c +++ b/drivers/gpu/drm/mediatek/mtk_padding.c @@ -137,10 +137,9 @@ static int mtk_padding_probe(struct platform_device *pdev) return 0; } -static int mtk_padding_remove(struct platform_device *pdev) +static void mtk_padding_remove(struct platform_device *pdev) { component_del(&pdev->dev, &mtk_padding_component_ops); - return 0; } static const struct of_device_id mtk_padding_driver_dt_match[] = { @@ -151,7 +150,7 @@ MODULE_DEVICE_TABLE(of, mtk_padding_driver_dt_match); struct platform_driver mtk_padding_driver = { .probe = mtk_padding_probe, - .remove = mtk_padding_remove, + .remove_new = mtk_padding_remove, .driver = { .name = "mediatek-disp-padding", .owner = THIS_MODULE, -- 2.43.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2024-04-09 17:03 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-04-09 17:02 [PATCH 0/4] gpu: Convert to platform remove callback returning void Uwe Kleine-König 2024-04-09 17:02 ` Uwe Kleine-König 2024-04-09 17:02 ` [PATCH 1/4] drm/imagination: " Uwe Kleine-König 2024-04-16 19:15 ` Matt Coster 2024-04-23 8:29 ` Matt Coster 2024-04-09 17:02 ` Uwe Kleine-König [this message] 2024-04-09 17:02 ` [PATCH 2/4] drm/mediatek: " Uwe Kleine-König 2024-05-16 2:54 ` CK Hu (胡俊光) 2024-05-16 2:54 ` CK Hu (胡俊光) 2024-05-16 2:54 ` CK Hu (胡俊光) 2024-05-16 10:12 ` AngeloGioacchino Del Regno 2024-05-16 10:12 ` AngeloGioacchino Del Regno 2024-04-09 17:02 ` [PATCH 3/4] gpu: host1x: " Uwe Kleine-König 2024-04-19 11:29 ` Thierry Reding 2024-04-09 17:02 ` [PATCH 4/4] gpu: ipu-v3: " Uwe Kleine-König 2024-04-10 8:29 ` Philipp Zabel 2024-04-09 17:10 ` [PATCH 0/4] gpu: " Uwe Kleine-König 2024-04-09 17:10 ` Uwe Kleine-König 2024-04-09 18:59 ` Thomas Zimmermann 2024-04-09 18:59 ` Thomas Zimmermann 2024-04-19 7:20 ` Uwe Kleine-König 2024-04-19 7:20 ` Uwe Kleine-König 2024-04-19 11:28 ` Thierry Reding 2024-04-19 11:28 ` Thierry Reding 2024-04-23 8:31 ` Matt Coster 2024-04-23 8:31 ` Matt Coster
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