linux-kernel - Re: [PATCH] lib80211: Use ERR

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Message-ID: <20240906190808.GL2097826@kernel.org>
Date: Fri, 6 Sep 2024 20:08:08 +0100
From: Simon Horman <horms@...nel.org>
To: Rohit Chavan <roheetchavan@...il.com>
Cc: Johannes Berg <johannes@...solutions.net>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] lib80211: Use ERR_CAST() to return

On Fri, Sep 06, 2024 at 05:14:55PM +0530, Rohit Chavan wrote:
> Using ERR_CAST() is more reasonable and safer, When it is necessary
> to convert the type of an error pointer and return it.
> 
> Signed-off-by: Rohit Chavan <roheetchavan@...il.com>
> ---
>  net/wireless/lib80211.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/wireless/lib80211.c b/net/wireless/lib80211.c
> index d66a913027e0..87c0e09aa676 100644
> --- a/net/wireless/lib80211.c
> +++ b/net/wireless/lib80211.c
> @@ -227,7 +227,7 @@ EXPORT_SYMBOL(lib80211_get_crypto_ops);
>  
>  static void *lib80211_crypt_null_init(int keyidx)
>  {
> -	return (void *)1;
> +	return ERR_CAST(1);

This seems wrong to me. ERR_CAST is designed to cast a pointer
to an error pointer. But 1 is an integer, not a pointer.

>  }
>  
>  static void lib80211_crypt_null_deinit(void *priv)
> -- 
> 2.34.1
> 
>