linux-kernel - Re: your patch

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Date:   Mon, 27 May 2019 16:03:55 +0200
From:   Cornelia Huck <cohuck@...hat.com>
To:     "Thomas Meyer" <thomas@...3r.de>
Cc:     alex.williamson@...hat.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: your patch

On Sun, 26 May 2019 13:44:04 +0200
"Thomas Meyer" <thomas@...3r.de> wrote:

> From thomas@...3r.de Sun May 26 00:13:26 2019
> Subject: [PATCH] vfio-pci/nvlink2: Use vma_pages function instead of explicit
>  computation
> To: alex.williamson@...hat.com, kvm@...r.kernel.org, linux-kernel@...r.kernel.org
> Content-Type: text/plain; charset="UTF-8"
> Mime-Version: 1.0
> Content-Transfer-Encoding: 8bit
> X-Patch: Cocci
> X-Mailer: DiffSplit
> Message-ID: <1558822461341-1674464153-1-diffsplit-thomas@...3r.de>
> References: <1558822461331-726613767-0-diffsplit-thomas@...3r.de>
> In-Reply-To: <1558822461331-726613767-0-diffsplit-thomas@...3r.de>
> X-Serial-No: 1

Hi,

some kind of accident seems to have happened to your patch... maybe the
missing colon after the 'From'?

> 
> Use vma_pages function on vma object instead of explicit computation.
> 
> Signed-off-by: Thomas Meyer <thomas@...3r.de>
> ---
> 
> diff -u -p a/drivers/vfio/pci/vfio_pci_nvlink2.c b/drivers/vfio/pci/vfio_pci_nvlink2.c
> --- a/drivers/vfio/pci/vfio_pci_nvlink2.c
> +++ b/drivers/vfio/pci/vfio_pci_nvlink2.c
> @@ -161,7 +161,7 @@ static int vfio_pci_nvgpu_mmap(struct vf
>  
>  	atomic_inc(&data->mm->mm_count);
>  	ret = (int) mm_iommu_newdev(data->mm, data->useraddr,
> -			(vma->vm_end - vma->vm_start) >> PAGE_SHIFT,
> +			vma_pages(vma),
>  			data->gpu_hpa, &data->mem);
>  
>  	trace_vfio_pci_nvgpu_mmap(vdev->pdev, data->gpu_hpa, data->useraddr,

The change looks good to me.

Reviewed-by: Cornelia Huck <cohuck@...hat.com>