diff options
Diffstat (limited to 'drivers/spi/spi-sirf.c')
| -rw-r--r-- | drivers/spi/spi-sirf.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c index 3c12f396d96a..0c039d4542a5 100644 --- a/drivers/spi/spi-sirf.c +++ b/drivers/spi/spi-sirf.c @@ -383,7 +383,8 @@ static int spi_sirfsoc_transfer(struct spi_device *spi, struct spi_transfer *t) struct dma_async_tx_descriptor *rx_desc, *tx_desc; sspi->dst_start = dma_map_single(&spi->dev, - sspi->rx, t->len, DMA_FROM_DEVICE); + sspi->rx, t->len, (t->tx_buf != t->rx_buf) ? + DMA_FROM_DEVICE : DMA_BIDIRECTIONAL); rx_desc = dmaengine_prep_slave_single(sspi->rx_chan, sspi->dst_start, t->len, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); @@ -391,7 +392,9 @@ static int spi_sirfsoc_transfer(struct spi_device *spi, struct spi_transfer *t) rx_desc->callback_param = &sspi->rx_done; sspi->src_start = dma_map_single(&spi->dev, - (void *)sspi->tx, t->len, DMA_TO_DEVICE); + (void *)sspi->tx, t->len, + (t->tx_buf != t->rx_buf) ? + DMA_TO_DEVICE : DMA_BIDIRECTIONAL); tx_desc = dmaengine_prep_slave_single(sspi->tx_chan, sspi->src_start, t->len, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |