linux-kernel - Re: [PATCH] switchtec: Fix an error handling

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Message-ID: <ddf51036-d86b-8ef7-37ad-1420397eb172@deltatee.com>
Date:   Mon, 10 Apr 2017 22:36:59 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        kurt.schwemmer@...rosemi.com, stephen.bates@...rosemi.com,
        bhelgaas@...gle.com
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] switchtec: Fix an error handling

Nice catch. Thanks.

Reviewed-by: Logan Gunthorpe <logang@...tatee.com>

Logan

On 10/04/17 10:32 PM, Christophe JAILLET wrote:
> 'stuser_create' returns an error pointer in case of error, not NULL.
> So test its return value with IS_ERR.
> 
> Fixes: 74004262f329 ("MicroSemi Switchtec management interface driver")
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---
>  drivers/pci/switch/switchtec.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
> index fcde98161d9a..cc6e085008fb 100644
> --- a/drivers/pci/switch/switchtec.c
> +++ b/drivers/pci/switch/switchtec.c
> @@ -608,7 +608,7 @@ static int switchtec_dev_open(struct inode *inode, struct file *filp)
>  	stdev = container_of(inode->i_cdev, struct switchtec_dev, cdev);
>  
>  	stuser = stuser_create(stdev);
> -	if (!stuser)
> +	if (IS_ERR(stuser))
>  		return PTR_ERR(stuser);
>  
>  	filp->private_data = stuser;
>