[PATCH] drm/i915/gvt: Fix an logic issue in ppgtt_allocate_oos_page

[Zhi Wang]

In ppgtt_allocate_oos_page, when there's no free oos_page, we'll sync an
old oos page and detach it. But that oos page may not belong to current
gvt, so we need to find corresponding gvt and sync to it.

Fixes: 2707e44 ("drm/i915/gvt: vGPU graphics memory virtualization")
Signed-off-by: Min He <min.he at intel.com>
Signed-off-by: Zhi Wang <zhi.a.wang at intel.com>
---
 drivers/gpu/drm/i915/gvt/gtt.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
index 6da4e44..cb13bc7 100644
--- a/drivers/gpu/drm/i915/gvt/gtt.c
+++ b/drivers/gpu/drm/i915/gvt/gtt.c
@@ -1160,6 +1160,7 @@ static int ppgtt_allocate_oos_page(struct intel_vgpu *vgpu,
 	struct intel_gvt *gvt = vgpu->gvt;
 	struct intel_gvt_gtt *gtt = &gvt->gtt;
 	struct intel_vgpu_oos_page *oos_page = gpt->oos_page;
+	struct intel_vgpu_ppgtt_spt *spt = NULL;
 	int ret;
 
 	WARN(oos_page, "shadow PPGTT page has already has a oos page\n");
@@ -1167,10 +1168,12 @@ static int ppgtt_allocate_oos_page(struct intel_vgpu *vgpu,
 	if (list_empty(&gtt->oos_page_free_list_head)) {
 		oos_page = container_of(gtt->oos_page_use_list_head.next,
 			struct intel_vgpu_oos_page, list);
-		ret = ppgtt_set_guest_page_sync(vgpu, oos_page->guest_page);
+		spt = guest_page_to_ppgtt_spt(oos_page->guest_page);
+		ret = ppgtt_set_guest_page_sync(spt->vgpu,
+				oos_page->guest_page);
 		if (ret)
 			return ret;
-		ret = detach_oos_page(vgpu, oos_page);
+		ret = detach_oos_page(spt->vgpu, oos_page);
 		if (ret)
 			return ret;
 	} else
-- 
1.9.1