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This patch marks dummy transfer by setting dummy_data bit to 1. Controllers supporting dummy transfer by hardware use this bit field to skip software transfer of dummy bytes and use hardware dummy bytes transfer. Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com> Link: https://lore.kernel.org/r/1608585459-17250-6-git-send-email-skomatineni@nvidia.com Signed-off-by: Mark Brown <broonie@kernel.org>