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Just do nothing if crct_set_base() is called with no FB. The oops happens when the user switches between X & vt or in some case when changing mode. Signed-off-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Airlie <airlied@redhat.com>