netdev - Re: [PATCH] net: broadcom: bcm4908_enet: update TX stats after actual transmission

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Message-ID: <087ad3a4-2be4-64ad-b5df-d0e31899ed1d@gmail.com>
Date:   Thu, 27 Oct 2022 09:12:19 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Rafał Miłecki <zajec5@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     netdev@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com,
        Rafał Miłecki <rafal@...ecki.pl>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: Re: [PATCH] net: broadcom: bcm4908_enet: update TX stats after actual
 transmission



On 10/27/2022 4:24 AM, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@...ecki.pl>
> 
> Queueing packets doesn't guarantee their transmission. Update TX stats
> after hardware confirms consuming submitted data.
> 
> This also fixes a possible race and NULL dereference.
> bcm4908_enet_start_xmit() could try to access skb after freeing it in
> the bcm4908_enet_poll_tx().
> 
> Reported-by: Florian Fainelli <f.fainelli@...il.com>
> Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>

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

To me this is 'net' material since it fixes a potential issue, but let's 
see what the netdev maintainers prefer.
-- 
Florian