linux-kernel - Re: [PATCH v2 01/10] dmaengine: imx-sdma: fix missing of_dma_controller

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Message-ID: <aMQwhV7DrKPCwMuP@lizhi-Precision-Tower-5810>
Date: Fri, 12 Sep 2025 10:39:01 -0400
From: Frank Li <Frank.li@....com>
To: Marco Felsch <m.felsch@...gutronix.de>
Cc: Vinod Koul <vkoul@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Jiada Wang <jiada_wang@...tor.com>, dmaengine@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 01/10] dmaengine: imx-sdma: fix missing
 of_dma_controller_free()

On Thu, Sep 11, 2025 at 11:56:42PM +0200, Marco Felsch wrote:
> Add the missing of_dma_controller_free() to free the resources allocated
> via of_dma_controller_register() during probe(). The missing free was
> introduced long time ago  by commit 23e118113782 ("dma: imx-sdma: use
> module_platform_driver for SDMA driver") while adding a proper .remove()
> implementation.
>
> Use the driver remove() callback to make it possible to backport this
> commit.
>
> Fixes: 23e118113782 ("dma: imx-sdma: use module_platform_driver for SDMA driver")
> Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
> ---

Reviewed-by: Frank Li <Frank.Li@....com>

>  drivers/dma/imx-sdma.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
> index 02a85d6f1bea2df7d355858094c0c0b0bd07148e..3ecb917214b1268b148a29df697b780bc462afa4 100644
> --- a/drivers/dma/imx-sdma.c
> +++ b/drivers/dma/imx-sdma.c
> @@ -2418,6 +2418,7 @@ static void sdma_remove(struct platform_device *pdev)
>  	struct sdma_engine *sdma = platform_get_drvdata(pdev);
>  	int i;
>
> +	of_dma_controller_free(sdma->dev->of_node);
>  	devm_free_irq(&pdev->dev, sdma->irq, sdma);
>  	dma_async_device_unregister(&sdma->dma_device);
>  	kfree(sdma->script_addrs);
>
> --
> 2.47.3
>