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drm/i915/gvt: Refine dmabuf_obj cleanup process

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In the process of dmabuf_obj cleanup, the dmabuf_obj might be freed during
dmabuf_obj_put leaking intel_gvt_hypervisor_put_vfio_device.

Move intel_gvt_hypervisor_put_vfio_device and all the other dmabuf_obj ops
in front of dmabuf_obj_put and let every dmabuf_obj have a chance to call
intel_gvt_hypervisor_put_vfio_device to fix this leaking issue.

Fixes: e3a0d7976c53 ("drm/i915/gvt: Handle orphan dmabuf_objs")
Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Tina Zhang 2017-12-08 15:17:38 +08:00 • committed by Zhenyu Wang
parent 072ec93d50
commit 6ee942d5f7
1 changed files with 7 additions and 8 deletions
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15
drivers/gpu/drm/i915/gvt/dmabuf.c
View file

@ -520,19 +520,18 @@ void intel_vgpu_dmabuf_cleanup(struct intel_vgpu *vgpu)
list_for_each_safe(pos, n, &vgpu->dmabuf_obj_list_head) {
dmabuf_obj = container_of(pos, struct intel_vgpu_dmabuf_obj,
list);
dmabuf_obj->vgpu = NULL;
idr_remove(&vgpu->object_idr, dmabuf_obj->dmabuf_id);
intel_gvt_hypervisor_put_vfio_device(vgpu);
list_del(pos);
/* dmabuf_obj might be freed in dmabuf_obj_put */
if (dmabuf_obj->initref) {
dmabuf_obj->initref = false;
dmabuf_obj_put(dmabuf_obj);
}
idr_remove(&vgpu->object_idr, dmabuf_obj->dmabuf_id);
if (dmabuf_obj->vgpu)
intel_gvt_hypervisor_put_vfio_device(vgpu);
list_del(pos);
dmabuf_obj->vgpu = NULL;
}
mutex_unlock(&vgpu->dmabuf_lock);
}