From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: "Alexis Lothoré" <alexis.lothore@bootlin.com>
Cc: Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
Richard Cochran <richardcochran@gmail.com>,
Daniel Machon <daniel.machon@microchip.com>,
Maxime Chevallier <maxime.chevallier@bootlin.com>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH net 2/2] net: stmmac: fix multiplication overflow when reading timestamp
Date: Tue, 22 Apr 2025 16:32:25 +0100 [thread overview]
Message-ID: <aAe2iULNthghEEEt@shell.armlinux.org.uk> (raw)
In-Reply-To: <20250422-stmmac_ts-v1-2-b59c9f406041@bootlin.com>
On Tue, Apr 22, 2025 at 05:07:23PM +0200, Alexis Lothoré wrote:
> ns = readl(ptpaddr + GMAC_PTP_ATNR);
> - ns += readl(ptpaddr + GMAC_PTP_ATSR) * NSEC_PER_SEC;
> + ns += (u64)(readl(ptpaddr + GMAC_PTP_ATSR)) * NSEC_PER_SEC;
I'm not sure what the extra parens around readl() are actually trying to
do. Please drop them if they're not useful.
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!
next prev parent reply other threads:[~2025-04-22 15:32 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-22 15:07 [PATCH net 0/2] net: stmmac: fix timestamp snapshots on dwmac1000 Alexis Lothore
2025-04-22 15:07 ` [PATCH net 1/2] net: stmmac: fix dwmac1000 ptp timestamp status offset Alexis Lothore
2025-04-22 15:49 ` Maxime Chevallier
2025-04-22 16:11 ` Alexis Lothoré
2025-04-22 15:07 ` [PATCH net 2/2] net: stmmac: fix multiplication overflow when reading timestamp Alexis Lothoré
2025-04-22 15:32 ` Russell King (Oracle) [this message]
2025-04-22 16:06 ` Alexis Lothoré
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