netdev - Re: [net-next PATCH 02/19] net: dsa: qca8k: remove redundant check in parse_port

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Date:   Fri, 19 Nov 2021 01:59:58 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Ansuel Smith <ansuelsmth@...il.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        kernel test robot <lkp@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [net-next PATCH 02/19] net: dsa: qca8k: remove redundant check
 in parse_port_config

On Wed, Nov 17, 2021 at 10:04:34PM +0100, Ansuel Smith wrote:
> The very next check for port 0 and 6 already make sure we don't go out
                                               ~~~~
                                               makes
> of bounds with the ports_config delay table.
> Remove the redundant check.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
> Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> ---

Reviewed-by: Vladimir Oltean <olteanv@...il.com>

>  drivers/net/dsa/qca8k.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
> index a429c9750add..bfffc1fb7016 100644
> --- a/drivers/net/dsa/qca8k.c
> +++ b/drivers/net/dsa/qca8k.c
> @@ -983,7 +983,7 @@ qca8k_parse_port_config(struct qca8k_priv *priv)
>  	u32 delay;
>  
>  	/* We have 2 CPU port. Check them */
> -	for (port = 0; port < QCA8K_NUM_PORTS && cpu_port_index < QCA8K_NUM_CPU_PORTS; port++) {
> +	for (port = 0; port < QCA8K_NUM_PORTS; port++) {
>  		/* Skip every other port */
>  		if (port != 0 && port != 6)
>  			continue;
> -- 
> 2.32.0
>