From: Nicolai Hähnle <nicolai.haehnle@xxxxxxx>
ttm_bo_init checks that the reservation object is locked. This is
the caller's responsibility when resv != NULL. Otherwise, the inline
reservation object of the newly allocated buffer is used and must
explicitly be locked.
Uninterruptible w/w locks without an acquire context are always
successful.
v2: use ww_mutex_lock
Signed-off-by: Nicolai Hähnle <nicolai.haehnle at amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor at folklore1984.net> (v1)
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 11c12c4d..4b2a5a9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -465,21 +465,30 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
amdgpu_ttm_placement_init(adev, &placement,
placements, domain, flags);
r = amdgpu_bo_create_restricted(adev, size, byte_align, kernel,
domain, flags, sg, &placement,
resv, bo_ptr);
if (r)
return r;
if (amdgpu_need_backup(adev) && (flags & AMDGPU_GEM_CREATE_SHADOW)) {
+ if (!resv) {
+ r = ww_mutex_lock(&(*bo_ptr)->tbo.resv->lock, NULL);
+ WARN_ON(r != 0);
+ }
+
r = amdgpu_bo_create_shadow(adev, size, byte_align, (*bo_ptr));
+
+ if (!resv)
+ ww_mutex_unlock(&(*bo_ptr)->tbo.resv->lock);
+
if (r)
amdgpu_bo_unref(bo_ptr);
}
return r;
}
int amdgpu_bo_backup_to_shadow(struct amdgpu_device *adev,
struct amdgpu_ring *ring,
struct amdgpu_bo *bo,
--
2.7.4
