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Date:   Mon, 1 Jul 2019 13:24:39 +0200
From:   Maxime Chevallier <maxime.chevallier@bootlin.com>
To:     Christoph Hellwig <hch@infradead.org>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Frank Rowand <frowand.list@gmail.com>,
        Russell King <linux@armlinux.org.uk>,
        David Miller <davem@davemloft.net>, brian.brooks@linaro.org,
        linux-kernel@vger.kernel.org,
        Antoine Tenart <antoine.tenart@bootlin.com>,
        thomas.petazzoni@bootlin.com, linux-arm-kernel@lists.infradead.org,
        nadavh@marvell.com, stefanc@marvell.com,
        Russell King <rmk+kernel@armlinux.org.uk>
Subject: Re: [PATCH] driver core: platform: Allow using a dedicated dma_mask
 for platform_device
Message-ID: <20190701132340.21123dee@bootlin.com>
In-Reply-To: <20190628155946.GA16956@infradead.org>
References: <20190628141550.22938-1-maxime.chevallier@bootlin.com>
 <20190628155946.GA16956@infradead.org>
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Hi Christoph,

On Fri, 28 Jun 2019 08:59:46 -0700
Christoph Hellwig <hch@infradead.org> wrote:

>I'd much rather bite the bullet and make dev->dma_mask a scalar
>instead of a pointer.  The pointer causes way to much boiler plate code,
>and the semantics are way to subtile.

I agree that this the real solution, it just seemed a bit overwhelming
to me. I'll be happy to help with this though, now that you took a big
first step.

> Below is a POV patch that
>compiles and boots with my usual x86 test config, and at least compiles
>with the arm and pmac32 defconfigs.  It probably breaks just about
>everything else, but should give us an idea what is involve in the
>switch:

I'll test that on my boards too.

Thanks,

Maxime