linux-kernel - Re: [PATCH] RFC: ptp: add comment about register access race

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Message-ID: <Z8Z87mkuRqE6VOTy@hoboy.vegasvil.org>
Date: Mon, 3 Mar 2025 20:09:18 -0800
From: Richard Cochran <richardcochran@...il.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Arnd Bergmann <arnd@...nel.org>,
	Thomas Weißschuh <thomas.weissschuh@...utronix.de>,
	Arnd Bergmann <arnd@...db.de>, 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>,
	Tianfei Zhang <tianfei.zhang@...el.com>,
	Jonathan Lemon <jonathan.lemon@...il.com>,
	Vadim Fedorenko <vadim.fedorenko@...ux.dev>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Thomas Weißschuh <linux@...ssschuh.net>,
	Calvin Owens <calvin@...nvd.org>,
	Philipp Stanner <pstanner@...hat.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-fpga@...r.kernel.org
Subject: Re: [PATCH] RFC: ptp: add comment about register access race

On Mon, Mar 03, 2025 at 09:50:01AM +0200, Andy Shevchenko wrote:
> Perhaps it's still good to have a comment, but rephrase it that the code is
> questionable depending on the HW behaviour that needs to be checked.

IIRC both ixp4xx and the PCH are the same design and latch high reg on
read of low.

Thanks,
Richard