linux-kernel - Re: regmap: Modeling a shared page selection register

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Message-ID: <aP-CDpbvgPpP3H8l@smile.fi.intel.com>
Date: Mon, 27 Oct 2025 16:30:38 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Mark Brown <broonie@...nel.org>
Cc: Christian Eggers <ceggers@...i.de>,
	Javier Carrasco <javier.carrasco.cruz@...il.com>,
	Krystian Garbaciak <krystian.garbaciak@...semi.com>,
	linux-kernel@...r.kernel.org
Subject: Re: regmap: Modeling a shared page selection register

On Mon, Oct 27, 2025 at 01:15:36PM +0000, Mark Brown wrote:
> On Mon, Oct 27, 2025 at 10:45:48AM +0200, Andy Shevchenko wrote:
> 
> > Right, the logic behind paging implementation in regmap is a bit tricky
> > (and has some known non-critical bugs, FWIW). There is no documentation
> > and it appears that most of the drivers using it, do it wrongly.
> 
> Which bugs are you referring to here?

For example one I tried to fix that makes the value pf the selector register in
virtual address space not synchronised with the page number.


-- 
With Best Regards,
Andy Shevchenko