spi/davinci: Use correct length parameter to dma_map_single calls
The davinci spi driver provides an option to use DMA transfers for
data. In the dma_map_single() call, the driver is passing the
number of words to be transfered for the mapping size. It should
be the number of bytes.
Signed-off-by: Michael Williamson <[email protected]>
Signed-off-by: Grant Likely <[email protected]>
diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c
index 6beab99..68ed377 100644
--- a/drivers/spi/davinci_spi.c
+++ b/drivers/spi/davinci_spi.c
@@ -591,10 +591,10 @@
if (t->tx_buf) {
t->tx_dma = dma_map_single(&spi->dev, (void *)t->tx_buf,
- dspi->wcount, DMA_TO_DEVICE);
+ t->len, DMA_TO_DEVICE);
if (dma_mapping_error(&spi->dev, t->tx_dma)) {
dev_dbg(sdev, "Unable to DMA map %d bytes"
- "TX buffer\n", dspi->wcount);
+ "TX buffer\n", t->len);
return -ENOMEM;
}
}
@@ -624,7 +624,7 @@
if (t->rx_buf) {
rx_buf = t->rx_buf;
- rx_buf_count = dspi->rcount;
+ rx_buf_count = t->len;
} else {
rx_buf = dspi->rx_tmp_buf;
rx_buf_count = sizeof(dspi->rx_tmp_buf);
@@ -636,7 +636,7 @@
dev_dbg(sdev, "Couldn't DMA map a %d bytes RX buffer\n",
rx_buf_count);
if (t->tx_buf)
- dma_unmap_single(NULL, t->tx_dma, dspi->wcount,
+ dma_unmap_single(NULL, t->tx_dma, t->len,
DMA_TO_DEVICE);
return -ENOMEM;
}
@@ -675,7 +675,7 @@
if (spicfg->io_type == SPI_IO_TYPE_DMA) {
if (t->tx_buf)
- dma_unmap_single(NULL, t->tx_dma, dspi->wcount,
+ dma_unmap_single(NULL, t->tx_dma, t->len,
DMA_TO_DEVICE);
dma_unmap_single(NULL, t->rx_dma, rx_buf_count,
