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由 Shawn Guo 提交于
The sdmac->status was designed to reflect the status of the tx, so simply return it in sdma_tx_status(). Then dma client can call dma_async_is_tx_complete() to know the status of the tx. Signed-off-by: NShawn Guo <shawn.guo@freescale.com> Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
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