drm/i915/gvt: more locking for ppgtt mm LRU list

[sfrench/cifs-2.6.git] / drivers / gpu / drm / i915 / gvt / gtt.c

diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
index 4b04af569c05c13df7cc4f6ca235abb0b281d025..7dc7bb850d0a67df92e47f74ef31232e329a68d3 100644 (file)
--- a/drivers/gpu/drm/i915/gvt/gtt.c
+++ b/drivers/gpu/drm/i915/gvt/gtt.c
@@ -1956,7 +1956,11 @@ void _intel_vgpu_mm_release(struct kref *mm_ref)
 
        if (mm->type == INTEL_GVT_MM_PPGTT) {
                list_del(&mm->ppgtt_mm.list);
+
+               mutex_lock(&mm->vgpu->gvt->gtt.ppgtt_mm_lock);
                list_del(&mm->ppgtt_mm.lru_list);
+               mutex_unlock(&mm->vgpu->gvt->gtt.ppgtt_mm_lock);
+
                invalidate_ppgtt_mm(mm);
        } else {
                vfree(mm->ggtt_mm.virtual_ggtt);