linux-kernel - Re: [PATCH 2/3] media: s5p-mfc:Add variant data for MFC v7 hardware for Exynos 3250 SOC

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: <aadbb452-506d-89cc-28d9-497369c0018e@samsung.com>
Date:   Thu, 3 Nov 2022 13:44:04 +0100
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Aakarsh Jain <aakarsh.jain@...sung.com>,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Cc:     andrzej.hajda@...el.com, mchehab@...nel.org,
        hverkuil-cisco@...all.nl, ezequiel@...guardiasur.com.ar,
        jernej.skrabec@...il.com, benjamin.gaignard@...labora.com,
        krzysztof.kozlowski+dt@...aro.org, stanimir.varbanov@...aro.org,
        dillon.minfei@...il.com, david.plowman@...pberrypi.com,
        mark.rutland@....com, robh+dt@...nel.org, krzk+dt@...nel.org,
        andi@...zian.org, alim.akhtar@...sung.com,
        aswani.reddy@...sung.com, pankaj.dubey@...sung.com,
        smitha.t@...sung.com
Subject: Re: [PATCH 2/3] media: s5p-mfc:Add variant data for MFC v7 hardware
 for Exynos 3250 SOC

On 03.11.2022 13:35, Krzysztof Kozlowski wrote:
> On 02/11/2022 09:06, Aakarsh Jain wrote:
>> commit "5441e9dafdfc6dc40fa" which adds mfc v7 support for
> Please run scripts/checkpatch.pl and fix reported warnings.
>
>> Exynos3250 and used the same compatible string as used by
>> Exynos5240 but both the IPs are a bit different in terms of
>> IP clock.
>> Lets add variant driver data based on the new compatible string
>> "samsung,exynos3250-mfc" for Exynos3250 SoC.
> Aren't you just missing the clock on Exynos3250?

Nope, the Exynos3250 variant indeed has only one clock and the driver 
code simply ignored the -ENOENT error while getting the clocks, see the 
code in drivers/media/platform/samsung/s5p-mfc/s5p_mfc_pm.c, so it 
worked fine even without it.

IMHO it is a good idea to clean this up.

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland