From: Andy Shevchenko <andriy.shevche...@linux.intel.com>
RX buffer is allocated from DMA coherent memory. Thus there is no need to call
DMA sync API for it.
Signed-off-by: Andy Shevchenko <andriy.shevche...@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
(cherry picked from commit 27c310c5c3129aac9d2f325211df85a82177f274)
Signed-off-by: Tan Jui Nee <jui.nee....@intel.com>
---
drivers/tty/serial/8250/8250_dma.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_dma.c
b/drivers/tty/serial/8250/8250_dma.c
index e508939..78259d3 100644
--- a/drivers/tty/serial/8250/8250_dma.c
+++ b/drivers/tty/serial/8250/8250_dma.c
@@ -54,9 +54,6 @@ static void __dma_rx_complete(void *param)
struct dma_tx_state state;
int count;
- dma_sync_single_for_cpu(dma->rxchan->device->dev, dma->rx_addr,
- dma->rx_size, DMA_FROM_DEVICE);
-
dma->rx_running = 0;
dmaengine_tx_status(dma->rxchan, dma->rx_cookie, &state);
@@ -152,9 +149,6 @@ int serial8250_rx_dma(struct uart_8250_port *p, unsigned
int iir)
dma->rx_cookie = dmaengine_submit(desc);
- dma_sync_single_for_device(dma->rxchan->device->dev, dma->rx_addr,
- dma->rx_size, DMA_FROM_DEVICE);
-
dma_async_issue_pending(dma->rxchan);
return 0;
--
1.9.1
--
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