From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de> To: Hector Martin <marcan@marcan.st>, Sven Peter <sven@svenpeter.dev>, Keith Busch <kbusch@kernel.org>, Jens Axboe <axboe@kernel.dk>, Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me> Cc: Alyssa Rosenzweig <alyssa@rosenzweig.io>, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-nvme@lists.infradead.org, kernel@pengutronix.de Subject: [PATCH] nvme-apple: Convert to platform remove callback returning void Date: Fri, 8 Mar 2024 09:51:10 +0100 [thread overview] Message-ID: <c035aaf3bffc16018d657dd3dab37751da9f3564.1709886922.git.u.kleine-koenig@pengutronix.de> (raw) 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/nvme/host/apple.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/nvme/host/apple.c b/drivers/nvme/host/apple.c index a480cdeac288..dd6ec0865141 100644 --- a/drivers/nvme/host/apple.c +++ b/drivers/nvme/host/apple.c @@ -1532,7 +1532,7 @@ static int apple_nvme_probe(struct platform_device *pdev) return ret; } -static int apple_nvme_remove(struct platform_device *pdev) +static void apple_nvme_remove(struct platform_device *pdev) { struct apple_nvme *anv = platform_get_drvdata(pdev); @@ -1547,8 +1547,6 @@ static int apple_nvme_remove(struct platform_device *pdev) apple_rtkit_shutdown(anv->rtk); apple_nvme_detach_genpd(anv); - - return 0; } static void apple_nvme_shutdown(struct platform_device *pdev) @@ -1598,7 +1596,7 @@ static struct platform_driver apple_nvme_driver = { .pm = pm_sleep_ptr(&apple_nvme_pm_ops), }, .probe = apple_nvme_probe, - .remove = apple_nvme_remove, + .remove_new = apple_nvme_remove, .shutdown = apple_nvme_shutdown, }; module_platform_driver(apple_nvme_driver); base-commit: 8ffc8b1bbd505e27e2c8439d326b6059c906c9dd -- 2.43.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de> To: Hector Martin <marcan@marcan.st>, Sven Peter <sven@svenpeter.dev>, Keith Busch <kbusch@kernel.org>, Jens Axboe <axboe@kernel.dk>, Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me> Cc: Alyssa Rosenzweig <alyssa@rosenzweig.io>, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-nvme@lists.infradead.org, kernel@pengutronix.de Subject: [PATCH] nvme-apple: Convert to platform remove callback returning void Date: Fri, 8 Mar 2024 09:51:10 +0100 [thread overview] Message-ID: <c035aaf3bffc16018d657dd3dab37751da9f3564.1709886922.git.u.kleine-koenig@pengutronix.de> (raw) 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/nvme/host/apple.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/nvme/host/apple.c b/drivers/nvme/host/apple.c index a480cdeac288..dd6ec0865141 100644 --- a/drivers/nvme/host/apple.c +++ b/drivers/nvme/host/apple.c @@ -1532,7 +1532,7 @@ static int apple_nvme_probe(struct platform_device *pdev) return ret; } -static int apple_nvme_remove(struct platform_device *pdev) +static void apple_nvme_remove(struct platform_device *pdev) { struct apple_nvme *anv = platform_get_drvdata(pdev); @@ -1547,8 +1547,6 @@ static int apple_nvme_remove(struct platform_device *pdev) apple_rtkit_shutdown(anv->rtk); apple_nvme_detach_genpd(anv); - - return 0; } static void apple_nvme_shutdown(struct platform_device *pdev) @@ -1598,7 +1596,7 @@ static struct platform_driver apple_nvme_driver = { .pm = pm_sleep_ptr(&apple_nvme_pm_ops), }, .probe = apple_nvme_probe, - .remove = apple_nvme_remove, + .remove_new = apple_nvme_remove, .shutdown = apple_nvme_shutdown, }; module_platform_driver(apple_nvme_driver); base-commit: 8ffc8b1bbd505e27e2c8439d326b6059c906c9dd -- 2.43.0
next reply other threads:[~2024-03-08 8:52 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-03-08 8:51 Uwe Kleine-König [this message] 2024-03-08 8:51 ` [PATCH] nvme-apple: Convert to platform remove callback returning void Uwe Kleine-König 2024-03-08 16:21 ` Keith Busch 2024-03-08 16:21 ` Keith Busch
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