linux-kernel - Re: [PATCH v2 11/13] iommu/rockchip: Use OF

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Date:   Wed, 17 Jan 2018 15:47:47 +0800
From:   JeffyChen <jeffy.chen@...k-chips.com>
To:     Tomasz Figa <tfiga@...omium.org>
CC:     linux-kernel@...r.kernel.org, Ricky Liang <jcliang@...omium.org>,
        Robin Murphy <robin.murphy@....com>,
        simon xue <xxm@...k-chips.com>,
        Heiko Stuebner <heiko@...ech.de>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        "list@....net:IOMMU DRIVERS" <iommu@...ts.linux-foundation.org>,
        Joerg Roedel <joro@...tes.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 11/13] iommu/rockchip: Use OF_IOMMU to attach devices
 automatically

On 01/17/2018 03:30 PM, Tomasz Figa wrote:
>> >but it's possible the probe failed after calling iommu_device_set_fwnode, so
>> >i'll try to add some checks here, and maybe adjust probe() to prevent it
>> >too.
> I think iommu_device_set_fwnode() is not enough for of_iommu_xlate()
> to find the IOMMU. The IOMMU is actually added to the IOMMU list by
> iommu_device_register(), which is last in the sequence, so I guess we
> should be fine.
>
hmmm, the later patch would change that ;) i'll fix it in the next version.

> Best regards,
> Tomasz
>
>
>