Re: [PATCH 1/5] driver core: Introduce device_iommu_mapped() function

[Greg Kroah-Hartman]

On Tue, Dec 04, 2018 at 06:25:00PM +0100, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@xxxxxxx>
> 
> 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@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
> ---
>  include/linux/device.h | 10 ++++++++++
>  1 file changed, 10 insertions(+)

Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>