linux-kernel - Re: Regression in next with gpiolib

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

Message-ID: <5c672146-2a4c-6da5-85b1-5f2bb2ae5649@codeaurora.org>
Date:   Wed, 30 Aug 2017 16:49:43 -0500
From:   Timur Tabi <timur@...eaurora.org>
To:     Tony Lindgren <tony@...mide.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Grygorii Strashko <grygorii.strashko@...com>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org
Subject: Re: Regression in next with gpiolib

On 08/30/2017 04:41 PM, Tony Lindgren wrote:
> It seems to be that we're now calling request and free on all gpios
> before they are properly configured?

Yes, that's what my patch does.  At the time, it seemed like a good idea 
-- request the GPIO before touching its hardware.  But it appears that 
the 'request' function of some drivers also re-muxes the GPIO in order 
to honor the request.

The question is whether that's correct behavior.  I don't know.

-- 
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm
Technologies, Inc.  Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.