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Commit 930c8dfe authored by Aleksei Gimbitskii's avatar Aleksei Gimbitskii Committed by Zhenyu Wang
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drm/i915/gvt: Check if get_next_pt_type() always returns a valid value 



According to gtt_type_table[] function get_next_pt_type() may returns
GTT_TYPE_INVALID in some cases. To prevent driver to try to create memory
page with invalid data type, additional check is added.

Signed-off-by: default avatarAleksei Gimbitskii <aleksei.gimbitskii@intel.com>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Zhi Wang <zhi.a.wang@intel.com>
Cc: Colin Xu <colin.xu@intel.com>
Reviewed-by: default avatarColin Xu <colin.xu@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent 4feeea1d

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

+3 −0
Original line number Diff line number Diff line
@@ -1076,6 +1076,9 @@ static struct intel_vgpu_ppgtt_spt *ppgtt_populate_spt_by_guest_entry( 
	} else {

		int type = get_next_pt_type(we->type);



		if (!gtt_type_is_pt(type))

			goto err;



		spt = ppgtt_alloc_spt_gfn(vgpu, type, ops->get_pfn(we), ips);

		if (IS_ERR(spt)) {

			ret = PTR_ERR(spt);