netdev - Re: [PATCH net] net: sfp-bus: fix SFP mode detect from bitrate

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Date: Mon, 15 Jan 2024 16:58:48 +0100
From: Maxime Chevallier <maxime.chevallier@...tlin.com>
To: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Cc: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
 <pabeni@...hat.com>, Simon Horman <horms@...nel.org>,
 netdev@...r.kernel.org
Subject: Re: [PATCH net] net: sfp-bus: fix SFP mode detect from bitrate

Hello Russell,

On Mon, 15 Jan 2024 12:43:38 +0000
"Russell King (Oracle)" <rmk+kernel@...linux.org.uk> wrote:

> The referenced commit moved the setting of the Autoneg and pause bits
> early in sfp_parse_support(). However, we check whether the modes are
> empty before using the bitrate to set some modes. Setting these bits
> so early causes that test to always be false, preventing this working,
> and thus some modules that used to work no longer do.
> 
> Move them just before the call to the quirk.
> 
> Fixes: 8110633db49d ("net: sfp-bus: allow SFP quirks to override Autoneg and pause bits")
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>

I don't have modules to trigger the bug, however the fix looks OK to me.

Reviewed-by: Maxime Chevallier <maxime.chevallier@...tlin.com>

Thanks,

Maxime