netdev - RE: [PATCH net] net: micrel: Fix PTP frame parsing for lan8841

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Message-ID: <CO1PR11MB4771C419286A41F67958967AE2682@CO1PR11MB4771.namprd11.prod.outlook.com>
Date: Thu, 11 Jan 2024 07:34:13 +0000
From: <Divya.Koppera@...rochip.com>
To: <Horatiu.Vultur@...rochip.com>, <andrew@...n.ch>, <hkallweit1@...il.com>,
	<linux@...linux.org.uk>, <davem@...emloft.net>, <edumazet@...gle.com>,
	<kuba@...nel.org>, <pabeni@...hat.com>, <richardcochran@...il.com>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<UNGLinuxDriver@...rochip.com>
Subject: RE: [PATCH net] net: micrel: Fix PTP frame parsing for lan8841

> The HW has the capability to check each frame if it is a PTP frame, which
> domain it is, which ptp frame type it is, different ip address in the frame. And if
> one of these checks fail then the frame is not timestamp. Most of these checks
> were disabled except checking the field minorVersionPTP inside the PTP
> header. Meaning that once a partner sends a frame compliant to 8021AS
> which has minorVersionPTP set to 1, then the frame was not timestamp
> because the HW expected by default a value of 0 in minorVersionPTP.
> Fix this issue by removing this check so the userspace can decide on this.
> 
> Fixes: cafc3662ee3f ("net: micrel: Add PHC support for lan8841")
> Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>

Reviewed-by: Divya Koppera <divya.koppera@...rochip.com>