linux-kernel - Re: [PATCH RFC 1/2] regmap: add option to disable debugfs

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Message-ID: <YrNH8/eaYHYeAWNJ@sirena.org.uk>
Date:   Wed, 22 Jun 2022 17:48:51 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Dong Aisheng <dongas86@...il.com>
Cc:     Aisheng Dong <aisheng.dong@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "l.stach@...gutronix.de" <l.stach@...gutronix.de>,
        Peng Fan <peng.fan@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>
Subject: Re: [PATCH RFC 1/2] regmap: add option to disable debugfs

On Thu, Jun 23, 2022 at 12:42:51AM +0800, Dong Aisheng wrote:
> On Thu, Jun 23, 2022 at 12:27 AM Mark Brown <broonie@...nel.org> wrote:

> > cache_bypass is only going to be true if something enabled bypass, why
> > would a device that doesn't use a cache enable bypass?  It does get
> > turned on transiently by things like patching but those only make sense
> > if the device can be accessed so caceh_only shouldn't be on then.

> It was enabled by default according to the code:
> __regmap_init -> regcache_init

Ah, right.  That makes sense - we should relax the check to only apply
if there is actually a cache.

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