spi: rockchip: rockchip_spi_prepare_dma return 1 if it is ok

If rockchip_spi_prepare_dma return 0, spi_transfer_one_message
won't wait for the dma complete event. Which may cause unknown
error.

Change-Id: Idf51a737bbd9fa9b9d1ae749636fe524de1cbfa9
Signed-off-by: Huibin Hong <huibin.hong@rock-chips.com>

diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index 42c8fcd82758d9b08864b975aeae3021b1c3c48e..573b8a4b4cc9bcd9033a9591e521737a8885f2e7 100644 (file)
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -499,7 +499,7 @@ static int rockchip_spi_prepare_dma(struct rockchip_spi *rs)
                dma_async_issue_pending(rs->dma_tx.ch);
        }
 
-       return 0;
+       return 1;
 }
 
 static void rockchip_spi_config(struct rockchip_spi *rs)