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@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net> (v1)
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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);
}