linux-kernel - Re: [PATCH 1/6] fs/nfsd/nfs4idmap.c: adjust inconsistent IS_ERR and PTR

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Message-ID: <20120828014436.GB20035@fieldses.org>
Date:	Mon, 27 Aug 2012 21:44:36 -0400
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Julia Lawall <Julia.Lawall@...6.fr>
Cc:	kernel-janitors@...r.kernel.org, linux-nfs@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] fs/nfsd/nfs4idmap.c: adjust inconsistent IS_ERR
 and PTR_ERR

On Sat, Aug 25, 2012 at 09:57:04PM +0200, Julia Lawall wrote:
> From: Julia Lawall <Julia.Lawall@...6.fr>
> 
> Change the call to PTR_ERR to access the value just tested by IS_ERR.

Applying for 3.7, thanks.--b.

> 
> The semantic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@
> expression e,e1;
> @@
> 
> (
> if (IS_ERR(e)) { ... PTR_ERR(e) ... }
> |
> if (IS_ERR(e=e1)) { ... PTR_ERR(e) ... }
> |
> *if (IS_ERR(e))
>  { ...
> *  PTR_ERR(e1)
>    ... }
> )
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
> 
> ---
>  fs/nfsd/nfs4idmap.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
> index fdc91a6..11df4ac 100644
> --- a/fs/nfsd/nfs4idmap.c
> +++ b/fs/nfsd/nfs4idmap.c
> @@ -478,7 +478,7 @@ nfsd_idmap_init(struct net *net)
>  		goto destroy_idtoname_cache;
>  	nn->nametoid_cache = cache_create_net(&nametoid_cache_template, net);
>  	if (IS_ERR(nn->nametoid_cache)) {
> -		rv = PTR_ERR(nn->idtoname_cache);
> +		rv = PTR_ERR(nn->nametoid_cache);
>  		goto unregister_idtoname_cache;
>  	}
>  	rv = cache_register_net(nn->nametoid_cache, net);
> 
--
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