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path: root/drivers/spi/atmel_spi.c
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Diffstat (limited to 'drivers/spi/atmel_spi.c')
-rw-r--r--drivers/spi/atmel_spi.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c
index 154529aacc03..1a478bf88c9d 100644
--- a/drivers/spi/atmel_spi.c
+++ b/drivers/spi/atmel_spi.c
@@ -341,9 +341,9 @@ static void atmel_spi_next_message(struct spi_master *master)
/*
* For DMA, tx_buf/tx_dma have the same relationship as rx_buf/rx_dma:
* - The buffer is either valid for CPU access, else NULL
- * - If the buffer is valid, so is its DMA addresss
+ * - If the buffer is valid, so is its DMA address
*
- * This driver manages the dma addresss unless message->is_dma_mapped.
+ * This driver manages the dma address unless message->is_dma_mapped.
*/
static int
atmel_spi_dma_map_xfer(struct atmel_spi *as, struct spi_transfer *xfer)
@@ -352,8 +352,12 @@ atmel_spi_dma_map_xfer(struct atmel_spi *as, struct spi_transfer *xfer)
xfer->tx_dma = xfer->rx_dma = INVALID_DMA_ADDRESS;
if (xfer->tx_buf) {
+ /* tx_buf is a const void* where we need a void * for the dma
+ * mapping */
+ void *nonconst_tx = (void *)xfer->tx_buf;
+
xfer->tx_dma = dma_map_single(dev,
- (void *) xfer->tx_buf, xfer->len,
+ nonconst_tx, xfer->len,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, xfer->tx_dma))
return -ENOMEM;