linux-kernel - Re: [PATCH net-next 4/5] net: mscc: ocelot: make entry_type a member of struct ocelot

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Date:   Wed, 28 Oct 2020 19:37:09 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vladimir Oltean <vladimir.oltean@....com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 4/5] net: mscc: ocelot: make entry_type a member
 of struct ocelot_multicast



On 10/28/2020 7:27 PM, Vladimir Oltean wrote:
> This saves a re-classification of the MDB address on deletion.
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
> ---

[snip]

>  	mc = ocelot_multicast_get(ocelot, mdb->addr, vid);
>  	if (!mc) {
>  		/* New entry */
> -		int pgid = ocelot_mdb_get_pgid(ocelot, entry_type);
> +		int pgid;
> +
> +		mc = devm_kzalloc(ocelot->dev, sizeof(*mc), GFP_KERNEL);

If the MDB object is programmed with SWITCHDEV_OBJ_ID_HOST_MDB then you
would need this gfp_t to be GFP_ATOMIC per
net/bridge/br_mdb.c::__br_mdb_notify, if this is a regular
SWITCHDEV_OBJ_ID_MDB then GFP_KERNEL appears to be fine.

Looks like this existed before, so that might have to be fixed separately.

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian