linux-kernel - Re: [PATCH net-next 04/10] net: microchip: sparx5: Use chain ids without offsets when enabling rules

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Message-ID: <Y+oZjg8EkKp46V9Z@kadam>
Date:   Mon, 13 Feb 2023 14:05:50 +0300
From:   Dan Carpenter <error27@...il.com>
To:     Steen Hegelund <steen.hegelund@...rochip.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, UNGLinuxDriver@...rochip.com,
        Randy Dunlap <rdunlap@...radead.org>,
        Casper Andersson <casper.casan@...il.com>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Wan Jiabing <wanjiabing@...o.com>,
        Nathan Huckleberry <nhuck@...gle.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Daniel Machon <daniel.machon@...rochip.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        Michael Walle <michael@...le.cc>
Subject: Re: [PATCH net-next 04/10] net: microchip: sparx5: Use chain ids
 without offsets when enabling rules

On Mon, Feb 13, 2023 at 10:24:20AM +0100, Steen Hegelund wrote:
> diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api.c b/drivers/net/ethernet/microchip/vcap/vcap_api.c
> index 68e04d47f6fd..9ca0cb855c3c 100644
> --- a/drivers/net/ethernet/microchip/vcap/vcap_api.c
> +++ b/drivers/net/ethernet/microchip/vcap/vcap_api.c
> @@ -1568,6 +1568,18 @@ static int vcap_write_counter(struct vcap_rule_internal *ri,
>  	return 0;
>  }
>  
> +/* Return the chain id rounded down to nearest lookup */
> +static int vcap_round_down_chain(int cid)
> +{
> +	return cid - (cid % VCAP_CID_LOOKUP_SIZE);
> +}
> +
> +/* Return the chain id rounded up to nearest lookup */
> +static int vcap_round_up_chain(int cid)
> +{
> +	return vcap_round_down_chain(cid + VCAP_CID_LOOKUP_SIZE);

Just use the round_up/down() macros.


> +}
> +

regards,
dan carpenter