From: jsg <jsg@openbsd.org>
Date: Tue, 19 Sep 2023 12:34:56 +0000 (+0000)
Subject: drm/i915/gvt: Put the page reference obtained by KVM's gfn_to_pfn()
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=5632c07a3087dc357ccaaff83fc7c2db555fd8e0;p=openbsd

drm/i915/gvt: Put the page reference obtained by KVM's gfn_to_pfn()

From Sean Christopherson
2b7510bb92c1fc19292801778e971cbb46e2499f in linux-6.1.y/6.1.54
708e49583d7da863898b25dafe4bcd799c414278 in mainline linux
---

diff --git a/sys/dev/pci/drm/i915/gvt/gtt.c b/sys/dev/pci/drm/i915/gvt/gtt.c
index 41c2bb49868..0bc3fe7fca8 100644
--- a/sys/dev/pci/drm/i915/gvt/gtt.c
+++ b/sys/dev/pci/drm/i915/gvt/gtt.c
@@ -1179,6 +1179,7 @@ static int is_2MB_gtt_possible(struct intel_vgpu *vgpu,
 {
 	const struct intel_gvt_gtt_pte_ops *ops = vgpu->gvt->gtt.pte_ops;
 	kvm_pfn_t pfn;
+	int ret;
 
 	if (!HAS_PAGE_SIZES(vgpu->gvt->gt->i915, I915_GTT_PAGE_SIZE_2M))
 		return 0;
@@ -1192,7 +1193,9 @@ static int is_2MB_gtt_possible(struct intel_vgpu *vgpu,
 	if (!pfn_valid(pfn))
 		return -EINVAL;
 
-	return PageTransHuge(pfn_to_page(pfn));
+	ret = PageTransHuge(pfn_to_page(pfn));
+	kvm_release_pfn_clean(pfn);
+	return ret;
 }
 
 static int split_2MB_gtt_entry(struct intel_vgpu *vgpu,