linux-kernel - Re: [PATCH 1/5] driver core: Introduce device_iommu

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Date:   Thu, 6 Dec 2018 13:55:20 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Joerg Roedel <joro@...tes.org>
Cc:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Joerg Roedel <jroedel@...e.de>
Subject: Re: [PATCH 1/5] driver core: Introduce device_iommu_mapped() function

On Tue, Dec 04, 2018 at 06:25:00PM +0100, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@...e.de>
> 
> Some places in the kernel check the iommu_group pointer in
> 'struct device' in order to find ot whether a device is
> mapped by an IOMMU.
> 
> This is not good way to make this check, as the pointer will
> be moved to 'struct dev_iommu_data'. This way to make the
> check is also not very readable.
> 
> Introduce an explicit function to perform this check.
> 
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Joerg Roedel <jroedel@...e.de>
> ---
>  include/linux/device.h | 10 ++++++++++
>  1 file changed, 10 insertions(+)

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>