linux-kernel - Re: [PATCH 8/9] drivers/mmc: correct error-handling code

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Message-ID: <20090728161115.GA8091@oksana.dev.rtsoft.ru>
Date:	Tue, 28 Jul 2009 20:11:15 +0400
From:	Anton Vorontsov <avorontsov@...mvista.com>
To:	Julia Lawall <julia@...u.dk>
Cc:	linuxppc-dev@...abs.org, sdhci-devel@...ts.ossman.eu,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 8/9] drivers/mmc: correct error-handling code

On Tue, Jul 28, 2009 at 05:56:00PM +0200, Julia Lawall wrote:
> From: Julia Lawall <julia@...u.dk>
> 
> sdhci_alloc_host returns an ERR_PTR value in an error case instead of NULL.
> 
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @match exists@
> expression x, E;
> statement S1, S2;
> @@
> 
> x = sdhci_alloc_host(...)
> ... when != x = E
> (
> *  if (x == NULL || ...) S1 else S2
> |
> *  if (x == NULL && ...) S1 else S2
> )
> // </smpl>
> 
> Signed-off-by: Julia Lawall <julia@...u.dk>

Acked-by: Anton Vorontsov <avorontsov@...mvista.com>

Thanks,

> ---
>  drivers/mmc/host/sdhci-of.c         |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-of.c b/drivers/mmc/host/sdhci-of.c
> index d79fa55..fb00bc5 100644
> --- a/drivers/mmc/host/sdhci-of.c
> +++ b/drivers/mmc/host/sdhci-of.c
> @@ -226,7 +226,7 @@ static int __devinit sdhci_of_probe(struct of_device *ofdev,
>  		return -ENODEV;
>  
>  	host = sdhci_alloc_host(&ofdev->dev, sizeof(*of_host));
> -	if (!host)
> +	if (IS_ERR(host))
>  		return -ENOMEM;
>  
>  	of_host = sdhci_priv(host);

-- 
Anton Vorontsov
email: cbouatmailru@...il.com
irc://irc.freenode.net/bd2
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