dmaengine: add DMA_TRANS_NONE to dma_transfer_direction

Before dma_transfer_direction was introduced to replace
dma_data_direction, some dmaengine device uses DMA_NONE of
dma_data_direction for some talk with its client drivers.
The mxs-dma and its clients mxs-mmc and gpmi-nand are such case.

This patch adds DMA_TRANS_NONE to dma_transfer_direction and
migrate the DMA_NONE use in mxs-dma to it.

It also fixes the compile warning below.

CC      drivers/dma/mxs-dma.o
drivers/dma/mxs-dma.c: In function ‘mxs_dma_prep_slave_sg’:
drivers/dma/mxs-dma.c:420:16: warning: comparison between ‘enum dma_transfer_direction’ and ‘enum dma_data_direction’

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index 6548595..493af2f 100644 (file)
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -391,7 +391,7 @@ static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
                idx = 0;
        }
 
-       if (direction == DMA_NONE) {
+       if (direction == DMA_TRANS_NONE) {
                ccw = &mxs_chan->ccw[idx++];
                pio = (u32 *) sgl;
 

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 5532bb8..679b349 100644 (file)
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -88,6 +88,7 @@ enum dma_transfer_direction {
        DMA_MEM_TO_DEV,
        DMA_DEV_TO_MEM,
        DMA_DEV_TO_DEV,
+       DMA_TRANS_NONE,
 };
 
 /**