linux-kernel - Re: [PATCH v10 03/19] vfio: Rearrange functions to get vfio

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Date:   Wed, 02 Nov 2016 18:41:11 +0800
From:   Jike Song <jike.song@...el.com>
To:     Kirti Wankhede <kwankhede@...dia.com>
CC:     alex.williamson@...hat.com, pbonzini@...hat.com, kraxel@...hat.com,
        cjia@...dia.com, qemu-devel@...gnu.org, kvm@...r.kernel.org,
        kevin.tian@...el.com, bjsdjshi@...ux.vnet.ibm.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v10 03/19] vfio: Rearrange functions to get vfio_group
 from dev

On 10/27/2016 05:29 AM, Kirti Wankhede wrote:
> This patch rearranges functions to get vfio_group from device
> 
> Signed-off-by: Kirti Wankhede <kwankhede@...dia.com>
> Signed-off-by: Neo Jia <cjia@...dia.com>
> Change-Id: I1f93262bdbab75094bc24b087b29da35ba70c4c6
> ---
>  drivers/vfio/vfio.c | 23 ++++++++++++++++-------
>  1 file changed, 16 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
> index d1d70e0b011b..23bc86c1d05d 100644
> --- a/drivers/vfio/vfio.c
> +++ b/drivers/vfio/vfio.c
> @@ -480,6 +480,21 @@ static struct vfio_group *vfio_group_get_from_minor(int minor)
>  	return group;
>  }
>  
> +static struct vfio_group *vfio_group_get_from_dev(struct device *dev)
> +{
> +	struct iommu_group *iommu_group;
> +	struct vfio_group *group;
> +
> +	iommu_group = iommu_group_get(dev);
> +	if (!iommu_group)
> +		return NULL;
> +
> +	group = vfio_group_get_from_iommu(iommu_group);
> +	iommu_group_put(iommu_group);
> +
> +	return group;
> +}
> +
>  /**
>   * Device objects - create, release, get, put, search
>   */
> @@ -811,16 +826,10 @@ EXPORT_SYMBOL_GPL(vfio_add_group_dev);
>   */
>  struct vfio_device *vfio_device_get_from_dev(struct device *dev)
>  {
> -	struct iommu_group *iommu_group;
>  	struct vfio_group *group;
>  	struct vfio_device *device;
>  
> -	iommu_group = iommu_group_get(dev);
> -	if (!iommu_group)
> -		return NULL;
> -
> -	group = vfio_group_get_from_iommu(iommu_group);
> -	iommu_group_put(iommu_group);
> +	group = vfio_group_get_from_dev(dev);
>  	if (!group)
>  		return NULL;
>  

Reviewed-by: Jike Song <jike.song@...el.com>

--
Thanks,
Jike