linux-kernel - Re: [PATCH v7 04/16] drivers: iommu: make of_iommu_set/get

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Date:   Fri, 11 Nov 2016 16:22:48 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:     iommu@...ts.linux-foundation.org,
        Will Deacon <will.deacon@....com>,
        Hanjun Guo <hanjun.guo@...aro.org>,
        Robin Murphy <robin.murphy@....com>,
        Marc Zyngier <marc.zyngier@....com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Tomasz Nowicki <tn@...ihalf.com>, Jon Masters <jcm@...hat.com>,
        Eric Auger <eric.auger@...hat.com>,
        Sinan Kaya <okaya@...eaurora.org>,
        Nate Watterson <nwatters@...eaurora.org>,
        Prem Mallappa <prem.mallappa@...adcom.com>,
        Dennis Chen <dennis.chen@....com>, linux-acpi@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v7 04/16] drivers: iommu: make of_iommu_set/get_ops() DT
 agnostic

On Wed, Nov 09, 2016 at 02:19:36PM +0000, Lorenzo Pieralisi wrote:
> +struct iommu_fwentry {
> +	struct list_head list;
> +	struct fwnode_handle *fwnode;
> +	const struct iommu_ops *ops;
> +};

Is there a reason the iommu_ops need to be stored there? Currently it
seems that the ops are only needed to get the of_xlate fn-ptr later. And
the place where it is called the iommu-ops should also be available
through pdev->dev->bus->iommu_ops.


	Joerg