linux-kernel - Re: linux-next: build failure after merge of the drm-intel-fixes tree

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Message-ID: <20170103025929.35gp5n27uc7iszra@zhen-hp.sh.intel.com>
Date:   Tue, 3 Jan 2017 10:59:29 +0800
From:   Zhenyu Wang <zhenyuw@...ux.intel.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Daniel Vetter <daniel.vetter@...ll.ch>,
        Intel Graphics <intel-gfx@...ts.freedesktop.org>,
        DRI <dri-devel@...ts.freedesktop.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jike Song <jike.song@...el.com>,
        Zhenyu Wang <zhenyuw@...ux.intel.com>
Subject: Re: linux-next: build failure after merge of the drm-intel-fixes tree

On 2017.01.03 10:42:39 +1100, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the drm-intel-fixes tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
> 
> drivers/gpu/drm/i915/gvt/kvmgt.c: In function 'intel_vgpu_open':
> drivers/gpu/drm/i915/gvt/kvmgt.c:511:32: error: dereferencing pointer to incomplete type 'struct mdev_device'
>   vfio_unregister_notifier(&mdev->dev, VFIO_GROUP_NOTIFY,
>                                 ^   
> 
> Caused by commit
> 
>   99e3123e3d72 ("vfio-mdev: Make mdev_device private and abstract interfaces")
> 
> from the vfio-fixes tree interacting with commit
> 
>   364fb6b789ff ("drm/i915/gvt/kvmgt: prevent double-release of vgpu")
> 
> from the drm-intel-fixes tree.

Alex, I liked to have kvmgt related mdev interface change be merged through
vfio tree, but wasn't awared one of Jike's fix had conflict. Could you apply
below fix in your tree? I think in general for possible interface change in
future we still need a pull request for i915 to resolve dependence earlier.

Thanks.

> 
> I applied this merge fix patch:
> 
> From: Stephen Rothwell <sfr@...b.auug.org.au>
> Date: Tue, 3 Jan 2017 10:38:48 +1100
> Subject: [PATCH] vfio-mdev: fixup for "Make mdev_device private and abstract interfaces"
> 
> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> ---
>  drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
> index c24b665e007b..faaae07ae487 100644
> --- a/drivers/gpu/drm/i915/gvt/kvmgt.c
> +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
> @@ -508,7 +508,7 @@ static int intel_vgpu_open(struct mdev_device *mdev)
>  	return ret;
>  
>  undo_group:
> -	vfio_unregister_notifier(&mdev->dev, VFIO_GROUP_NOTIFY,
> +	vfio_unregister_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY,
>  					&vgpu->vdev.group_notifier);
>  
>  undo_iommu:
> -- 
> 2.10.2
> 
> -- 
> Cheers,
> Stephen Rothwell

-- 
Open Source Technology Center, Intel ltd.

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