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If the rdc_buffer is above 2G we need indirect addresssing so we have to use an idaw to give the rdc_buffer to the ccw. If the rdc_buffer is under 2G nothing changes. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>