linux-kernel - Re: [PATCH 2/2] i2c: qcom-geni: Provide an option to disable DMA processing

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, 5 Sep 2019 15:34:23 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Wolfram Sang <wsa@...-dreams.de>
Cc:     alokc@...eaurora.org, agross@...nel.org, robh+dt@...nel.org,
        mark.rutland@....com, bjorn.andersson@...aro.org,
        linux-i2c@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, vkoul@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] i2c: qcom-geni: Provide an option to disable DMA
 processing

On Thu, 05 Sep 2019, Wolfram Sang wrote:

> On Thu, Sep 05, 2019 at 10:28:16AM +0100, Lee Jones wrote:
> > On Thu, 05 Sep 2019, Wolfram Sang wrote:
> > 
> > > 
> > > > Fixes: 8bc529b25354 ("soc: qcom: geni: Add support for ACPI")
> > > 
> > > Are you sure? From visual inspection, I don't see a correlation between
> > > this commit and the fix here.
> > 
> > This patch should have been part of the commit, or at the very least,
> > part of the set, alluded to above.  Unfortunately, I was carrying
> > Bjorn's hack which simply returned early from geni_se_rx_dma_prep()
> > with an error, so it masked the issue.
> 
> I still don't see why this basic ACPI enabling code (not touching DMA
> but only clocks and pinctrl) causes and additional handling for DMA. Am
> I overlooking something obvious?

Please ignore, I'm discussing with another patch in mind.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog