atmel_spi: fix warning In function 'atmel_spi_dma_map_xfer'
authorJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Sat, 20 Nov 2010 06:52:53 +0000 (14:52 +0800)
committerNicolas Ferre <nicolas.ferre@atmel.com>
Tue, 30 Nov 2010 16:23:24 +0000 (17:23 +0100)
passing argument 2 of 'dma_map_single' discards qualifiers from pointer target type

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
drivers/spi/atmel_spi.c

index 154529aacc037e332b005c418659089d80d5c9c5..a067046c9da288b368fecc1aee31aa4cef32c2b7 100644 (file)
@@ -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;