drm/radeon: do not try to uselessly update virtual memory pagetable

If a buffer is never bound to a virtual memory pagetable than don't try
to unbind it. Only drawback is that we don't update the pagetable when
unbinding the ib pool buffer which is fine because it only happens at
suspend or module unload/shutdown.

Fixes spurious messages about buffers without VM mappings. E.g.:
radeon 0000:01:00.0: bo ffff88020afac400 don't has a mapping in vm ffff88021ca2b900

Cc: stable@kernel.org
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/radeon_gart.c b/drivers/gpu/drm/radeon/radeon_gart.c
index 2c1341f63dc5afa19e94bc4aac51e5986b4b3cdf..43ec4a401f077809371e0360f22aa7f10c21af3b 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_gart.c
+++ b/drivers/gpu/drm/radeon/radeon_gart.c
@@ -1197,11 +1197,13 @@ int radeon_vm_bo_update_pte(struct radeon_device *rdev,
 int radeon_vm_bo_rmv(struct radeon_device *rdev,
                     struct radeon_bo_va *bo_va)
 {
-       int r;
+       int r = 0;
 
        mutex_lock(&rdev->vm_manager.lock);
        mutex_lock(&bo_va->vm->mutex);
-       r = radeon_vm_bo_update_pte(rdev, bo_va->vm, bo_va->bo, NULL);
+       if (bo_va->soffset) {
+               r = radeon_vm_bo_update_pte(rdev, bo_va->vm, bo_va->bo, NULL);
+       }
        mutex_unlock(&rdev->vm_manager.lock);
        list_del(&bo_va->vm_list);
        mutex_unlock(&bo_va->vm->mutex);