netdev - Re: [PATCH net 3/5] net: lan743x: reject unsupported external timestamp requests

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Message-ID: <20250318140034.GS688833@kernel.org>
Date: Tue, 18 Mar 2025 14:00:34 +0000
From: Simon Horman <horms@...nel.org>
To: Jacob Keller <jacob.e.keller@...el.com>
Cc: Tony Nguyen <anthony.l.nguyen@...el.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	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>,
	Richard Cochran <richardcochran@...il.com>,
	Ruud Bos <kernel.hbk@...il.com>,
	Paul Barker <paul.barker.ct@...renesas.com>,
	Niklas Söderlund <niklas.soderlund@...natech.se>,
	Bryan Whitehead <bryan.whitehead@...rochip.com>,
	UNGLinuxDriver@...rochip.com,
	Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>,
	Florian Fainelli <florian.fainelli@...adcom.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>,
	Jonathan Lemon <jonathan.lemon@...il.com>,
	Lasse Johnsen <l@...johnsen.me>,
	Vadim Fedorenko <vadim.fedorenko@...ux.dev>,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH net 3/5] net: lan743x: reject unsupported external
 timestamp requests

On Mon, Mar 10, 2025 at 03:16:38PM -0700, Jacob Keller wrote:
> The lan743x_ptp_io_event_cap_en() function checks that the given request
> sets only one of PTP_RISING_EDGE or PTP_FALLING_EDGE, but not both.
> 
> However, this driver does not check whether other flags (such as
> PTP_EXT_OFF) are set, nor whether any future unrecognized flags are set.
> 
> Fix this by adding the appropriate check to the lan743x_ptp_io_extts()
> function.
> 
> Fixes: 60942c397af6 ("net: lan743x: Add support for PTP-IO Event Input External Timestamp (extts)")
> Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>

Reviewed-by: Simon Horman <horms@...nel.org>