linux-kernel - Re: [PATCH] vfio: platform: use vfio_iommu_group

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Message-ID: <20160509093238.3901f0b7@t450s.home>
Date:	Mon, 9 May 2016 09:32:38 -0600
From:	Alex Williamson <alex.williamson@...hat.com>
To:	Peng Fan <van.freenix@...il.com>
Cc:	b.reynal@...tualopensystems.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] vfio: platform: use vfio_iommu_group_get/put

On Mon,  9 May 2016 18:01:43 +0800
Peng Fan <van.freenix@...il.com> wrote:

> Use vfio_iommu_group_get and vfio_iommu_group_put, but not
> iommu_group_get or iommu_group_put.

I assume you're trying to duplicate the vfio_pci changes from commit
03a76b60f8ba to enable no-iommu mode.  That would be really relevant
information for the commit log.

> 
> Signed-off-by: Peng Fan <van.freenix@...il.com>
> Cc: Baptiste Reynal <b.reynal@...tualopensystems.com>
> Cc: Alex Williamson <alex.williamson@...hat.com>
> ---
>  drivers/vfio/platform/vfio_platform_common.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
> index e65b142..582885e 100644
> --- a/drivers/vfio/platform/vfio_platform_common.c
> +++ b/drivers/vfio/platform/vfio_platform_common.c
> @@ -561,7 +561,7 @@ int vfio_platform_probe_common(struct vfio_platform_device *vdev,
>  
>  	vdev->device = dev;
>  
> -	group = iommu_group_get(dev);
> +	group = vfio_iommu_group_get(dev);
>  	if (!group) {
>  		pr_err("VFIO: No IOMMU group for device %s\n", vdev->name);
>  		return -EINVAL;
> @@ -569,7 +569,7 @@ int vfio_platform_probe_common(struct vfio_platform_device *vdev,
>  
>  	ret = vfio_add_group_dev(dev, &vfio_platform_ops, vdev);
>  	if (ret) {
> -		iommu_group_put(group);
> +		vfio_iommu_group_put(group);
>  		return ret;
>  	}
>  
> @@ -589,7 +589,7 @@ struct vfio_platform_device *vfio_platform_remove_common(struct device *dev)
>  
>  	if (vdev) {
>  		vfio_platform_put_reset(vdev);
> -		iommu_group_put(dev->iommu_group);
> +		vfio_iommu_group_put(dev->iommu_group, dev);
>  	}
>  
>  	return vdev;