Put the struct page reference acquired by gfn_to_pfn(), KVM's API is that the caller is ultimately responsible for dropping any reference.
Note, kvm_release_pfn_clean() ensures the pfn is actually a refcounted struct page before trying to put any references. Fixes: b901b252b6cf ("drm/i915/gvt: Add 2M huge gtt support") Reviewed-by: Yan Zhao <yan.y.z...@intel.com> Tested-by: Yongwei Ma <yongwei...@intel.com> Signed-off-by: Sean Christopherson <sea...@google.com> --- drivers/gpu/drm/i915/gvt/gtt.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c index f30922c55a0c..5426a27c1b71 100644 --- a/drivers/gpu/drm/i915/gvt/gtt.c +++ b/drivers/gpu/drm/i915/gvt/gtt.c @@ -1158,6 +1158,7 @@ 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; @@ -1171,7 +1172,9 @@ 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, -- 2.41.0.487.g6d72f3e995-goog