linux-kernel - Re: [PATCH] spi: sprd: add runtime pm for transfer message

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:   Mon, 2 Nov 2020 11:17:30 +0800
From:   Chunyan Zhang <zhang.lyra@...il.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     linux-spi@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang7@...il.com>,
        Chunyan Zhang <chunyan.zhang@...soc.com>,
        Bangzheng Liu <bangzheng.liu@...soc.com>
Subject: Re: [PATCH] spi: sprd: add runtime pm for transfer message

On Fri, 30 Oct 2020 at 21:42, Mark Brown <broonie@...nel.org> wrote:
>
> On Fri, Oct 30, 2020 at 03:24:44PM +0800, Chunyan Zhang wrote:
> > From: Bangzheng Liu <bangzheng.liu@...soc.com>
> >
> > Before transfer one message, spi core would set chipselect, sprd spi
> > device should be resumed from runtime suspend, otherwise kernel would
> > crash once access spi registers. The sprd spi device can be suspended
> > until clearing chipselect which would be executed after transfer.
>
> The core should be handling runtime PM for normal transfers, if it's not
> managing to do that then we should fix the core so it's fixed for all
> drivers not just this one.

Sure, I will send a new patch.