netdev - Re: [PATCH net-next V2 1/2] net: dsa: bcm_sf2: add function finding RGMII register

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Message-ID: <5d0d3fba-a914-778c-79dc-8b0cbe29b3c6@gmail.com>
Date:   Thu, 18 Mar 2021 14:33:08 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Rafał Miłecki <zajec5@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: Re: [PATCH net-next V2 1/2] net: dsa: bcm_sf2: add function finding
 RGMII register



On 3/18/2021 1:01 AM, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@...ecki.pl>
> 
> Simple macro like REG_RGMII_CNTRL_P() is insufficient as:
> 1. It doesn't validate port argument
> 2. It doesn't support chipsets with non-lineral RGMII regs layout
> 
> Missing port validation could result in getting register offset from out
> of array. Random memory -> random offset -> random reads/writes. It
> affected e.g. BCM4908 for REG_RGMII_CNTRL_P(7).
> 
> Fixes: a78e86ed586d ("net: dsa: bcm_sf2: Prepare for different register layouts")
> Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>

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