linux-kernel - Re: [PATCH 02/11] dmaengine: dw-axi-dmac: remove unnecessary devm_free

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Message-ID: <ZDbsiKV2nOUhrRiU@matsya>
Date:   Wed, 12 Apr 2023 23:08:16 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Jisheng Zhang <jszhang@...nel.org>
Cc:     Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
        dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/11] dmaengine: dw-axi-dmac: remove unnecessary
 devm_free_irq() calling

On 14-03-23, 01:04, Jisheng Zhang wrote:
> In dw_remove(), We have disabled the irq from the dw-axi-dma side, so
> we are safe against the case "The irq is still ON when devices remove
> is executed and irq should be quiesced before remove is completed."

what about the interrupts which might fire spuriously after this? I
prefer to keep this explicitly here
> 
> Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
> ---
>  drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
> index 23a10dbdecb7..56f12dfa410d 100644
> --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
> +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
> @@ -1542,8 +1542,6 @@ static int dw_remove(struct platform_device *pdev)
>  	pm_runtime_disable(chip->dev);
>  	axi_dma_suspend(chip);
>  
> -	devm_free_irq(chip->dev, chip->irq, chip);
> -
>  	of_dma_controller_free(chip->dev->of_node);
>  
>  	list_for_each_entry_safe(chan, _chan, &dw->dma.channels,
> -- 
> 2.39.2

-- 
~Vinod