netdev - Re: [PATCH net] net: stmmac: prevent division by 0 in stmmac_init_tstamp

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Message-ID: <a49cff49-3fe5-417d-8f71-7ec63a68112d@linux.dev>
Date: Sun, 7 Sep 2025 18:41:24 +0100
From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
To: Sergey Shtylyov <s.shtylyov@....ru>, Andrew Lunn <andrew+netdev@...n.ch>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>, netdev@...r.kernel.org,
 linux-stm32@...md-mailman.stormreply.com
Cc: linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net] net: stmmac: prevent division by 0 in
 stmmac_init_tstamp_counter()

On 05/09/2025 17:06, Sergey Shtylyov wrote:
> In stmmac_init_tstamp_counter(), the sec_inc variable is initialized to 0,
> and if stmmac_config_sub_second_increment() fails to set it to some non-0

How that can happen? Do you have real kernel oops log?