linux-kernel - Re: [PATCH v2] net: fec: limit register access on i.MX6UL

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Message-ID: <Y1fbaY6SSLppusvx@lunn.ch>
Date:   Tue, 25 Oct 2022 14:49:45 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Juergen Borleis <jbe@...gutronix.de>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: Re: [PATCH v2] net: fec: limit register access on i.MX6UL

On Mon, Oct 24, 2022 at 10:05:52AM +0200, Juergen Borleis wrote:
> Using 'ethtool -d […]' on an i.MX6UL leads to a kernel crash:
> 
>    Unhandled fault: external abort on non-linefetch (0x1008) at […]
> 
> due to this SoC has less registers in its FEC implementation compared to other
> i.MX6 variants. Thus, a run-time decision is required to avoid access to
> non-existing registers.
> 
> Signed-off-by: Juergen Borleis <jbe@...gutronix.de>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew