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Message-ID: <55b501d3-e564-4356-8912-44f24bb53332@broadcom.com>
Date:   Wed, 11 Oct 2023 08:43:55 -0700
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Subject: Re: [PATCH] i2c: brcmstb: Add support for atomic transfers
To:     Marek Szyprowski <m.szyprowski@samsung.com>,
        linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org
Cc:     Kamal Dasu <kamal.dasu@broadcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@broadcom.com>,
        Andi Shyti <andi.shyti@kernel.org>,
        Wolfram Sang <wsa@kernel.org>
References: <CGME20231006144123eucas1p111cbbdbd70927ffbd697f7edf6b7ae1c@eucas1p1.samsung.com>
 <20231006144117.4079796-1-m.szyprowski@samsung.com>
 <bec3b967-f287-4a99-9c79-3b949a31c296@broadcom.com>
 <c7d8b05a-f5cb-49aa-95c0-48754fab1b7f@samsung.com>
From:   Florian Fainelli <florian.fainelli@broadcom.com>
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In-Reply-To: <c7d8b05a-f5cb-49aa-95c0-48754fab1b7f@samsung.com>
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On 10/11/2023 2:57 AM, Marek Szyprowski wrote:
> On 09.10.2023 22:41, Florian Fainelli wrote:
>> On 10/6/23 07:41, Marek Szyprowski wrote:
>>> Add support for atomic transfers using polling mode with interrupts
>>> intentionally disabled to get rid of the warning introduced by commit
>>> 63b96983a5dd ("i2c: core: introduce callbacks for atomic transfers")
>>> during system reboot and power-off.
>>
>> Is there an existing system that you have access to which needs atomic
>> transfer support, or is this a forward looking change?
> 
> Frankly speaking I've observed the mentioned warning during system
> reboot on RaspberryPi4 with linux-next kernel compiled from
> multi_v7_defconfig. It looks that this driver is used by VC4 DRM for
> DDC. This issue doesn't look critical, but the fix seems to be trivial,
> thus my patch.

Makes sense, thanks for confirming this fixes an actual issue you have 
seen and providing a fix for it.
-- 
Florian

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