0033-drm-i915-gvt-Fix-xengt-opregion-handling-in-migratio.patch

From 2436c6796a42ce4547ffab080ffe46c23b03d928 Mon Sep 17 00:00:00 2001
From: Yulei Zhang <yulei.zhang@intel.com>
Date: Fri, 11 May 2018 16:24:07 +0800
Subject: [PATCH 33/56] drm/i915/gvt: Fix xengt opregion handling in migration

opregion will be allocated when create the vgpu instance, will
reuse the opregion instead of ceating a new one after migrate.

Signed-off-by: Yulei Zhang <yulei.zhang@intel.com>
---
 drivers/gpu/drm/i915/gvt/migrate.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/migrate.c b/drivers/gpu/drm/i915/gvt/migrate.c
index ea728bc5ae58..a10117eaf730 100644
--- a/drivers/gpu/drm/i915/gvt/migrate.c
+++ b/drivers/gpu/drm/i915/gvt/migrate.c
@@ -401,9 +401,12 @@ static int opregion_load(const struct gvt_migration_obj_t *obj, u32 size)
 		size);
 		return n_transfer;
 	} else {
-		vgpu_opregion(vgpu)->va = (void *)__get_free_pages(GFP_KERNEL |
-			__GFP_ZERO,
-			get_order(INTEL_GVT_OPREGION_SIZE));
+		if (vgpu_opregion(vgpu)->va == NULL) {
+			vgpu_opregion(vgpu)->va = (void *)__get_free_pages(GFP_KERNEL |
+				__GFP_ZERO,
+				get_order(INTEL_GVT_OPREGION_SIZE));
+		}
+
 		n_transfer = obj->region.size;
 		memcpy(vgpu_opregion(vgpu)->va, obj->img + obj->offset, n_transfer);
 	}
-- 
2.34.1