[PATCH] drm/i915/gvt: return error code if dma map iova failed

[Zhenyu Wang]

On 2017.02.14 17:15:54 +0800, Chuanxiao Dong wrote:
> When doing dma map failed for a pfn, kvmgt should unpin the
> pfn and return error code to device module driver
> 
> Signed-off-by: Chuanxiao Dong <chuanxiao.dong at intel.com>
> Cc: xinda.zhao at intel.com
> ---

applied, thanks!

>  drivers/gpu/drm/i915/gvt/kvmgt.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
> index db2c965..0f7f5d9 100644
> --- a/drivers/gpu/drm/i915/gvt/kvmgt.c
> +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
> @@ -1402,8 +1402,11 @@ static unsigned long kvmgt_gfn_to_pfn(unsigned long handle, unsigned long gfn)
>  	}
>  	/* transfer to host iova for GFX to use DMA */
>  	rc = gvt_dma_map_iova(info->vgpu, pfn, &iova);
> -	if (rc)
> +	if (rc) {
>  		gvt_err("gvt_dma_map_iova failed for gfn: 0x%lx\n", gfn);
> +		vfio_unpin_pages(dev, &gfn, 1);
> +		return INTEL_GVT_INVALID_ADDR;
> +	}
>  
>  	gvt_cache_add(info->vgpu, gfn, iova);
>  	return iova;
> -- 
> 2.7.4
> 
> _______________________________________________
> intel-gvt-dev mailing list
> intel-gvt-dev at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gvt-dev

-- 
Open Source Technology Center, Intel ltd.

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