linux-kernel - Re: [PATCH v2 3/3] soc: qcom: geni: Optimize/comment select fifo/dma mode

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: <4aa43d91-b470-afae-bb1c-3955136fb969@codeaurora.org>
Date:   Wed, 14 Oct 2020 14:47:02 +0530
From:   Akash Asthana <akashast@...eaurora.org>
To:     Douglas Anderson <dianders@...omium.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Wolfram Sang <wsa@...nel.org>
Cc:     linux-i2c@...r.kernel.org,
        Roja Rani Yarubandi <rojay@...eaurora.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        linux-arm-msm@...r.kernel.org, Andy Gross <agross@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/3] soc: qcom: geni: Optimize/comment select fifo/dma
 mode


On 10/14/2020 2:55 AM, Douglas Anderson wrote:
> The functions geni_se_select_fifo_mode() and
> geni_se_select_fifo_mode() are a little funny.  They read/write a
> bunch of memory mapped registers even if they don't change or aren't
> relevant for the current protocol.  Let's make them a little more
> sane.  We'll also add a comment explaining why we don't do some of the
> operations for UART.
>
> NOTE: there is no evidence at all that this makes any performance
> difference and it fixes no bugs.  However, it seems (to me) like it
> makes the functions a little easier to understand.  Decreasing the
> amount of times we read/write memory mapped registers is also nice,
> even if we are using "relaxed" variants.
>
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
Reviewed-by: Akash Asthana <akashast@...eaurora.org>

The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project