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The reference manual states that idle condition detect should not be used with DMA transfers, as the ROM SDMA scripts don't check those conditions. The RAM SDMA scripts worked around this, but the change broke compatibility with the ROM scripts. The previous commits fixed the DMA burst sizes, so that the aging timer is now working as described in the reference manual. With this fixed we can remove the hack of using the idle condition detect to stop the DMA transfer if there are no new characters incoming. This should work with both the ROM and RAM SDMA scripts. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Acked-by: Jiada Wang <jiada_wang@mentor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>