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Driver was checking for direct mode but not locking it. Use claim/release helper functions to guarantee the device stays in direct mode during raw writes. Signed-off-by: Alison Schofield <amsfield22@gmail.com> Acked-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>