linux-kernel - Re: [PATCH v1] dmaengine: tegra-apb: Ensure that clock is enabled during of DMA synchronization

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]

Message-ID: <20200427160543.GH56386@vkoul-mobl.Dlink>
Date:   Mon, 27 Apr 2020 21:35:43 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Laxman Dewangan <ldewangan@...dia.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        dmaengine@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] dmaengine: tegra-apb: Ensure that clock is enabled
 during of DMA synchronization

On 26-04-20, 22:08, Dmitry Osipenko wrote:
> DMA synchronization hook checks whether interrupt is raised by testing
> corresponding bit in a hardware status register, and thus, clock should
> be enabled in this case, otherwise CPU may hang if synchronization is
> invoked while Runtime PM is in suspended state. This patch resumes the RPM
> during of the DMA synchronization process in order to avoid potential
> problems. It is a minor clean up of a previous commit, no real problem is
> fixed by this patch because currently RPM is always in a resumed state
> while DMA is synchronized, although this may change in the future.

Applied, thanks

-- 
~Vinod