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Date:   Fri, 26 Oct 2018 18:30:04 +0200
From:   Boris Brezillon <boris.brezillon@bootlin.com>
To:     vitor <vitor.soares@synopsys.com>
Cc:     Wolfram Sang <wsa@the-dreams.de>, <linux-i2c@vger.kernel.org>,
        "Jonathan Corbet" <corbet@lwn.net>, <linux-doc@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Przemyslaw Sroka <psroka@cadence.com>,
        Arkadiusz Golec <agolec@cadence.com>,
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        Bartosz Folta <bfolta@cadence.com>,
        Damian Kos <dkos@cadence.com>,
        Alicja Jurasik-Urbaniak <alicja@cadence.com>,
        "Cyprian Wronka" <cwronka@cadence.com>,
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        "Rafal Ciepiela" <rafalc@cadence.com>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
        Nishanth Menon <nm@ti.com>, Rob Herring <robh+dt@kernel.org>,
        Pawel Moll <pawel.moll@arm.com>,
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        Ian Campbell <ijc+devicetree@hellion.org.uk>,
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        Peter Rosin <peda@axentia.se>,
        Mike Shettel <mshettel@codeaurora.org>,
        Stephen Boyd <swboyd@chromium.org>
Subject: Re: [PATCH v10 0/9] Add the I3C subsystem
Message-ID: <20181026183004.4857ce73@bbrezillon>
In-Reply-To: <87738b8d-8033-9ef1-b0fb-059b64b0dc96@synopsys.com>
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        <20181026181548.53228a4b@bbrezillon>
        <87738b8d-8033-9ef1-b0fb-059b64b0dc96@synopsys.com>
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On Fri, 26 Oct 2018 17:20:42 +0100
vitor <vitor.soares@synopsys.com> wrote:

> On 26/10/18 17:15, Boris Brezillon wrote:
> > On Fri, 26 Oct 2018 16:22:06 +0100
> > vitor <vitor.soares@synopsys.com> wrote:
> >  
> >> Can you update the i3c/next tree?  
> > Done.  
> 
> Thanks.
> 
> I will apply the driver and them I give you feedback.

Great! Note that the bug in the ->send_ccc_cmd() path should be fixed,
but you might have issues with i2c transfers as msg->buf is not
guaranteed to be aligned on 32-bit.

Don't know if you've followed the discussion with Arnd, but it seems
some (most?) archs are making sure writesl()/readsl() work for
unaligned bufs. Maybe we should fix that for ARC. The other solution is
to use i2c_get_dma_safe_msg_buf() to get something aligned on a
cache-line and by extension aligned on 32bits.