linux-kernel - RE: [EXT] Re: Issue: regmap: use debugfs even when no device

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Thu, 30 May 2019 04:56:22 +0000
From:   Andy Duan <fugang.duan@....com>
To:     Mark Brown <broonie@...nel.org>
CC:     "david@...hnology.com" <david@...hnology.com>,
        "rafael@...nel.org" <rafael@...nel.org>,
        Robby Cai <robby.cai@....com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: RE: [EXT] Re: Issue: regmap: use debugfs even when no device

From: Mark Brown <broonie@...nel.org> Sent: Wednesday, May 29, 2019 7:16 PM
> To: Andy Duan <fugang.duan@....com>
> Cc: david@...hnology.com; rafael@...nel.org; Robby Cai
> <robby.cai@....com>; gregkh@...uxfoundation.org; linux-kernel
> <linux-kernel@...r.kernel.org>
> Subject: Re: [EXT] Re: Issue: regmap: use debugfs even when no device
> 
> On Wed, May 29, 2019 at 01:33:46AM +0000, Andy Duan wrote:
> 
> > Correct, regmap without device also has issue when power if off,
> > because regmap doesn't implement runtime pm for the device, but maybe
> > device driver implement the runtime pm for the device.
> 
> > So regmap how to manage the clock and power when access registers by
> debugfs ?
> 
> Like I say the basic recommendation is to use a cache.

Got it, thanks.