commit faa98f7ea6c720beec8a800c9ac6975f760467e2
author Laxman Dewangan <ldewangan@nvidia.com> Fri Nov 23 14:52:39 2012 +0530
committer Mark Brown <broonie@opensource.wolfsonmicro.com> Mon Apr 01 14:34:44 2013 +0100
tree 2a5f58b598e92e4b540194759ac0ab6cc8e79bac
parent 8179bb2655b607d4c3e8cea10a60eb3cf8557b63

spi: tegra: slink: do not prepare dma transfer with DMA_CTRL_ACK flag

Spi starts transfer using dma with DMA_CTRL_ACK which is not require
becasue spi driver does not use completed dma_desc after transfer
done and so it does not ack the dma descriptor. Removing the
DMA_CTRL_ACK flag to avoid memory leak in dma driver.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/spi/spi-tegra20-slink.c

diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index 17224f0..4e58b53 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -467,7 +467,7 @@
 	INIT_COMPLETION(tspi->tx_dma_complete);
 	tspi->tx_dma_desc = dmaengine_prep_slave_single(tspi->tx_dma_chan,
 				tspi->tx_dma_phys, len, DMA_MEM_TO_DEV,
-				DMA_PREP_INTERRUPT |  DMA_CTRL_ACK);
+				DMA_PREP_INTERRUPT);
 	if (!tspi->tx_dma_desc) {
 		dev_err(tspi->dev, "Not able to get desc for Tx\n");
 		return -EIO;
@@ -486,7 +486,7 @@
 	INIT_COMPLETION(tspi->rx_dma_complete);
 	tspi->rx_dma_desc = dmaengine_prep_slave_single(tspi->rx_dma_chan,
 				tspi->rx_dma_phys, len, DMA_DEV_TO_MEM,
-				DMA_PREP_INTERRUPT |  DMA_CTRL_ACK);
+				DMA_PREP_INTERRUPT);
 	if (!tspi->rx_dma_desc) {
 		dev_err(tspi->dev, "Not able to get desc for Rx\n");
 		return -EIO;