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Commit b6b6fbc8 authored by Chuanxiao Dong's avatar Chuanxiao Dong Committed by Zhenyu Wang
Browse files

drm/i915/gvt: use pfn_valid for better checking 



Before get the page from pfn, use pfn_valid to check if pfn
is able to translate to page structure.

Signed-off-by: default avatarChuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent 858b0f57

drivers/gpu/drm/i915/gvt/kvmgt.c

+2 −2
Original line number Diff line number Diff line
@@ -96,10 +96,10 @@ static int gvt_dma_map_iova(struct intel_vgpu *vgpu, kvm_pfn_t pfn, 
	struct device *dev = &vgpu->gvt->dev_priv->drm.pdev->dev;

	dma_addr_t daddr;



	page = pfn_to_page(pfn);

	if (is_error_page(page))

	if (unlikely(!pfn_valid(pfn)))

		return -EFAULT;



	page = pfn_to_page(pfn);

	daddr = dma_map_page(dev, page, 0, PAGE_SIZE,

			PCI_DMA_BIDIRECTIONAL);

	if (dma_mapping_error(dev, daddr))