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drm/i915/gvt: remove the extra vfio_device refcounting for dmabufs

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All the dmabufs are torn down when th VGPU is released, so there is
no need for extra refcounting here.

Based on an patch from Jason Gunthorpe.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-25-hch@lst.de
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
This commit is contained in:
Christoph Hellwig 2022-04-11 16:13:53 +02:00 committed by Zhi Wang
parent 5f8f3fe67c
commit 37e4bdbd5b
2 changed files with 0 additions and 13 deletions
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12
drivers/gpu/drm/i915/gvt/dmabuf.c
View File

@ -139,7 +139,6 @@ static void dmabuf_gem_object_free(struct kref *kref)
dmabuf_obj = list_entry(pos, struct intel_vgpu_dmabuf_obj, list);
if (dmabuf_obj == obj) {
list_del(pos);
vfio_device_put(vgpu->vfio_device);
idr_remove(&vgpu->object_idr,
dmabuf_obj->dmabuf_id);
kfree(dmabuf_obj->info);
@ -473,16 +472,6 @@ int intel_vgpu_query_plane(struct intel_vgpu *vgpu, void *args)
kref_init(&dmabuf_obj->kref);
mutex_lock(&vgpu->dmabuf_lock);
vgpu->vfio_device = vfio_device_get_from_dev(mdev_dev(vgpu->mdev));
if (!vgpu->vfio_device) {
gvt_vgpu_err("failed to get vfio device\n");
mutex_unlock(&vgpu->dmabuf_lock);
ret = -ENODEV;
goto out_free_info;
}
mutex_unlock(&vgpu->dmabuf_lock);
update_fb_info(gfx_plane_info, &fb_info);
INIT_LIST_HEAD(&dmabuf_obj->list);
@ -587,7 +576,6 @@ void intel_vgpu_dmabuf_cleanup(struct intel_vgpu *vgpu)
dmabuf_obj->vgpu = NULL;
idr_remove(&vgpu->object_idr, dmabuf_obj->dmabuf_id);
vfio_device_put(vgpu->vfio_device);
list_del(pos);
/* dmabuf_obj might be freed in dmabuf_obj_put */

1
drivers/gpu/drm/i915/gvt/gvt.h
View File

@ -231,7 +231,6 @@ struct intel_vgpu {
struct kvm *kvm;
struct work_struct release_work;
atomic_t released;
struct vfio_device *vfio_device;
struct vfio_group *vfio_group;
struct kvm_page_track_notifier_node track_node;