netdev - Re: [PATCH v2 net-next 09/10] net: dsa: felix: support changing the MTU

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Date:   Wed, 25 Mar 2020 16:10:21 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vladimir Oltean <olteanv@...il.com>, andrew@...n.ch,
        vivien.didelot@...il.com, davem@...emloft.net,
        jakub.kicinski@...ronome.com
Cc:     murali.policharla@...adcom.com, stephen@...workplumber.org,
        jiri@...nulli.us, idosch@...sch.org, kuba@...nel.org,
        nikolay@...ulusnetworks.com, netdev@...r.kernel.org
Subject: Re: [PATCH v2 net-next 09/10] net: dsa: felix: support changing the
 MTU



On 3/25/2020 8:22 AM, Vladimir Oltean wrote:
> From: Vladimir Oltean <vladimir.oltean@....com>
> 
> Changing the MTU for this switch means altering the
> DEV_GMII:MAC_CFG_STATUS:MAC_MAXLEN_CFG field MAX_LEN, which in turn
> limits the size of frames that can be received.
> 
> Special accounting needs to be done for the DSA CPU port (NPI port in
> hardware terms). The NPI port configuration needs to be held inside the
> private ocelot structure, since it is now accessed from multiple places.
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>

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