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Date:   Mon, 4 Dec 2023 09:44:40 +0100
From:   Christoph Hellwig <hch@lst.de>
To:     Robin Murphy <robin.murphy@arm.com>
Cc:     Joerg Roedel <joro@8bytes.org>, Christoph Hellwig <hch@lst.de>,
        Vineet Gupta <vgupta@kernel.org>,
        Russell King <linux@armlinux.org.uk>,
        Catalin Marinas <catalin.marinas@arm.com>,
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        Huacai Chen <chenhuacai@kernel.org>,
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        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
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        Lorenzo Pieralisi <lpieralisi@kernel.org>,
        Hanjun Guo <guohanjun@huawei.com>,
        Sudeep Holla <sudeep.holla@arm.com>,
        "K. Y. Srinivasan" <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
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        linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org,
        iommu@lists.linux.dev, devicetree@vger.kernel.org
Subject: Re: [PATCH 7/7] dma-mapping: Simplify arch_setup_dma_ops()
Message-ID: <20231204084440.GB919@lst.de>
References: <cover.1701268753.git.robin.murphy@arm.com> <590a4a1b7d10fb9bb1c42ca6cd438e98e6cc94a7.1701268753.git.robin.murphy@arm.com>
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On Wed, Nov 29, 2023 at 05:43:04PM +0000, Robin Murphy wrote:
> The dma_base, size and iommu arguments are only used by ARM, and can
> now easily be deduced from the device itself, so there's no need to pass
> them through the callchain as well.

This looks even better than the patch form Jason that only removed the
iommu argument:

Reviewed-by: Christoph Hellwig <hch@lst.de>

I wonder if it makes sense to also remove the coherent argument
by setting up dev->dma_coherent in the caller.  That would require
a pretty careful audit as we're doing a few weird things in that
area, though.