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.zhao@intel.com>
Tested-by: Yongwei Ma <yongwei.ma@intel.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Link: https://lore.kernel.org/r/20230729013535.1070024-6-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
{
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;
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,