linux-kernel - Re: [PATCH] drivers/ata/pata_mpc52xx.c: add missing kfree

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Date:	Sat, 10 Mar 2012 19:32:18 +0100
From:	walter harms <wharms@....de>
To:	Julia Lawall <Julia.Lawall@...6.fr>
CC:	Jeff Garzik <jgarzik@...ox.com>, kernel-janitors@...r.kernel.org,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH] drivers/ata/pata_mpc52xx.c: add missing kfree



Am 10.03.2012 18:56, schrieb Julia Lawall:
> From: Julia Lawall <Julia.Lawall@...6.fr>
> 
> There is no need to call the devm cleanup functions on failure of a probe
> or remove function.
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
> 
> ---
>  drivers/ata/pata_mpc52xx.c |   11 -----------
>  1 file changed, 11 deletions(-)
> 
> diff --git a/drivers/ata/pata_mpc52xx.c b/drivers/ata/pata_mpc52xx.c
> index 00748ae..1f02008 100644
> --- a/drivers/ata/pata_mpc52xx.c
> +++ b/drivers/ata/pata_mpc52xx.c
> @@ -806,17 +806,12 @@ mpc52xx_ata_probe(struct platform_device *op)
>  	return 0;
>  
>   err:
> -	devm_release_mem_region(&op->dev, res_mem.start, sizeof(*ata_regs));
>  	if (ata_irq)
>  		irq_dispose_mapping(ata_irq);
>  	if (task_irq)
>  		irq_dispose_mapping(task_irq);

hi julia,
i did a quick look at lxr and it showed that irq_dispose_mapping()
is only used with powerpc, and here is it checking for
	if (virq == NO_IRQ)
            return;

I do not know how current the lxt on free-electrons.com is but perhaps
it is possible to dump the if (ata_irq) stuff.

can you double check it ?

re,
 wh


>  	if (dmatsk)
>  		bcom_ata_release(dmatsk);
> -	if (ata_regs)
> -		devm_iounmap(&op->dev, ata_regs);
> -	if (priv)
> -		devm_kfree(&op->dev, priv);
>  	return rv;
>  }
>  
> @@ -835,12 +830,6 @@ mpc52xx_ata_remove(struct platform_device *op)
>  	bcom_ata_release(priv->dmatsk);
>  	irq_dispose_mapping(priv->ata_irq);
>  
> -	/* Clear up IO allocations */
> -	devm_iounmap(&op->dev, priv->ata_regs);
> -	devm_release_mem_region(&op->dev, priv->ata_regs_pa,
> -				sizeof(*priv->ata_regs));
> -	devm_kfree(&op->dev, priv);
> -
>  	return 0;
>  }
>  
> 
> --
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> 
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