drm/radeon: check bo_va->bo is non-NULL before using it

The call to radeon_vm_clear_freed might clear bo_va->bo, so
we have to check it before dereferencing it.

Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c
index 2ef201a072f1689c933b789272c573af196fe9e8..e66a230331eefc3b535ccc55372b8ec9171e1b62 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_gem.c
+++ b/drivers/gpu/drm/radeon/radeon_gem.c
@@ -642,7 +642,7 @@ static void radeon_gem_va_update_vm(struct radeon_device *rdev,
        if (r)
                goto error_unlock;
 
-       if (bo_va->it.start)
+       if (bo_va->it.start && bo_va->bo)
                r = radeon_vm_bo_update(rdev, bo_va, bo_va->bo->tbo.resource);
 
 error_unlock: