Commit 6dc6f261 authored by Stefan Wahren's avatar Stefan Wahren Committed by Ulf Hansson

mmc: bcm2835: Refactor dma_map_sg handling

There are two variables len within bcm2835_prepare_dma. So rename the
result of dma_map_sg to sg_len. While we are at this add a bail out to
simplify the following change.
Signed-off-by: default avatarStefan Wahren <stefan.wahren@i2se.com>
Acked-by: default avatarEric Anholt <eric@anholt.net>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 37fefade
......@@ -453,7 +453,7 @@ static void bcm2835_transfer_pio(struct bcm2835_host *host)
static
void bcm2835_prepare_dma(struct bcm2835_host *host, struct mmc_data *data)
{
int len, dir_data, dir_slave;
int sg_len, dir_data, dir_slave;
struct dma_async_tx_descriptor *desc = NULL;
struct dma_chan *dma_chan;
......@@ -499,15 +499,13 @@ void bcm2835_prepare_dma(struct bcm2835_host *host, struct mmc_data *data)
&host->dma_cfg_rx :
&host->dma_cfg_tx);
len = dma_map_sg(dma_chan->device->dev, data->sg, data->sg_len,
sg_len = dma_map_sg(dma_chan->device->dev, data->sg, data->sg_len,
dir_data);
if (!sg_len)
return;
if (len > 0) {
desc = dmaengine_prep_slave_sg(dma_chan, data->sg,
len, dir_slave,
DMA_PREP_INTERRUPT |
DMA_CTRL_ACK);
}
desc = dmaengine_prep_slave_sg(dma_chan, data->sg, sg_len, dir_slave,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (desc) {
desc->callback = bcm2835_dma_complete;
......
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