linux-kernel - Re: [PATCH 1/2] handle error path in edac_mc_sysfs

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Date:	Thu, 25 Oct 2012 14:48:52 -0200
From:	Mauro Carvalho Chehab <mchehab@...hat.com>
To:	Borislav Petkov <bp@...64.org>
Cc:	Denis Kirjanov <kirjanov@...il.com>,
	Borislav Petkov <bp@...en8.de>, linux-edac@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] handle error path in edac_mc_sysfs_init()

Em Thu, 25 Oct 2012 18:36:53 +0200
Borislav Petkov <bp@...64.org> escreveu:

> (remove Doug's email from CC since it bounces)
> 
> On Thu, Oct 25, 2012 at 05:57:29PM +0200, Borislav Petkov wrote:
> > On Thu, Oct 25, 2012 at 05:56:06PM +0200, Borislav Petkov wrote:
> > > Would you be willing to fix that too, while you're at it? Btw, I can
> > > totally understand if you say no - I'll take care of it myself instead
> > > then :-).
> > 
> > Ah, maybe I should look at the second patch before replying to this one.
> > Nevermind, I'll merge the two into one and test.
> 
> Ok, here's the final version I'm sending upstream soon:
> 
> --
> From a8373ecc0c26d8afafd0d2e88f96756e26b7f3ee Mon Sep 17 00:00:00 2001
> From: Denis Kirjanov <kirjanov@...il.com>
> Date: Thu, 25 Oct 2012 19:42:58 +0400
> Subject: [PATCH] EDAC: Handle error path in edac_mc_sysfs_init() properly
> 
> Make sure proper deregistration happens on all error paths in
> edac_mc_sysfs_init.
> 
> Signed-off-by: Denis Kirjanov <kirjanov@...il.com>
> [ Boris: cleanup and concretize commit message ]
> Signed-off-by: Borislav Petkov <bp@...en8.de>

Acked-by: Mauro Carvalho Chehab <mchehab@...hat.com>

> ---
>  drivers/edac/edac_mc_sysfs.c | 17 +++++++++++++++--
>  1 file changed, 15 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c
> index 52813b8b0f5f..de2df92f9c77 100644
> --- a/drivers/edac/edac_mc_sysfs.c
> +++ b/drivers/edac/edac_mc_sysfs.c
> @@ -1126,10 +1126,15 @@ int __init edac_mc_sysfs_init(void)
>  	edac_subsys = edac_get_sysfs_subsys();
>  	if (edac_subsys == NULL) {
>  		edac_dbg(1, "no edac_subsys\n");
> -		return -EINVAL;
> +		err = -EINVAL;
> +		goto out;
>  	}
>  
>  	mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
> +	if (!mci_pdev) {
> +		err = -ENOMEM;
> +		goto out_put_sysfs;
> +	}
>  
>  	mci_pdev->bus = edac_subsys;
>  	mci_pdev->type = &mc_attr_type;
> @@ -1138,11 +1143,18 @@ int __init edac_mc_sysfs_init(void)
>  
>  	err = device_add(mci_pdev);
>  	if (err < 0)
> -		return err;
> +		goto out_dev_free;
>  
>  	edac_dbg(0, "device %s created\n", dev_name(mci_pdev));
>  
>  	return 0;
> +
> + out_dev_free:
> +	kfree(mci_pdev);
> + out_put_sysfs:
> +	edac_put_sysfs_subsys();
> + out:
> +	return err;
>  }
>  
>  void __exit edac_mc_sysfs_exit(void)
> @@ -1150,4 +1162,5 @@ void __exit edac_mc_sysfs_exit(void)
>  	put_device(mci_pdev);
>  	device_del(mci_pdev);
>  	edac_put_sysfs_subsys();
> +	kfree(mci_pdev);
>  }


-- 
Regards,
Mauro
--
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