linux-kernel - Re: [PATCH] net: phy: mdio-bcm-unimac: Cast denominator to unsigned long to avoid overflow

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Date: Fri, 8 Mar 2024 19:52:19 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Florian Fainelli <florian.fainelli@...adcom.com>
Cc: Daniil Dulov <d.dulov@...ddin.ru>, Doug Berger <opendmb@...il.com>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@...adcom.com>, Andrew Lunn <andrew@...n.ch>,
 Heiner Kallweit <hkallweit1@...il.com>, Russell King
 <linux@...linux.org.uk>, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 lvc-project@...uxtesting.org
Subject: Re: [PATCH] net: phy: mdio-bcm-unimac: Cast denominator to unsigned
 long to avoid overflow

On Thu, 7 Mar 2024 12:21:26 -0800 Florian Fainelli wrote:
> On 3/7/2024 5:19 AM, Daniil Dulov wrote:
> > The expression priv->clk_freq * 2 can lead to overflow that will cause
> > a division by zero. So, let's cast it to unsigned long to avoid it.  
> 
> It will not in real life because the maximum clock frequency is 250MHz, 
> but it also does not hurt.

If that's the case - Daniil, could you respin against net-next without
the Fixes tag? Otherwise it'll cause a conflict, if it's not a real
issue no point creating an extra hassle.
-- 
pw-bot: cr