netdev - Re: [PATCH net-next 2/7] ipv4: nexthop: Use nla_put_be32() for NHA

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Date:   Wed, 26 Aug 2020 13:07:53 -0600
From:   David Ahern <dsahern@...il.com>
To:     Ido Schimmel <idosch@...sch.org>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, mlxsw@...dia.com,
        Ido Schimmel <idosch@...dia.com>
Subject: Re: [PATCH net-next 2/7] ipv4: nexthop: Use nla_put_be32() for
 NHA_GATEWAY

On 8/26/20 10:48 AM, Ido Schimmel wrote:
> From: Ido Schimmel <idosch@...dia.com>
> 
> The code correctly uses nla_get_be32() to get the payload of the
> attribute, but incorrectly uses nla_put_u32() to add the attribute to
> the payload. This results in the following warning:
> 
> net/ipv4/nexthop.c:279:59: warning: incorrect type in argument 3 (different base types)
> net/ipv4/nexthop.c:279:59:    expected unsigned int [usertype] value
> net/ipv4/nexthop.c:279:59:    got restricted __be32 [usertype] ipv4
> 
> Suppress the warning by using nla_put_be32().
> 
> Signed-off-by: Ido Schimmel <idosch@...dia.com>
> ---
>  net/ipv4/nexthop.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
> index d13730ff9aeb..0823643a7dec 100644
> --- a/net/ipv4/nexthop.c
> +++ b/net/ipv4/nexthop.c
> @@ -276,7 +276,7 @@ static int nh_fill_node(struct sk_buff *skb, struct nexthop *nh,
>  	case AF_INET:
>  		fib_nh = &nhi->fib_nh;
>  		if (fib_nh->fib_nh_gw_family &&
> -		    nla_put_u32(skb, NHA_GATEWAY, fib_nh->fib_nh_gw4))
> +		    nla_put_be32(skb, NHA_GATEWAY, fib_nh->fib_nh_gw4))
>  			goto nla_put_failure;
>  		break;
>  
> 

Reviewed-by: David Ahern <dsahern@...il.com>