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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2015-09-30 10:04:17 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-04 19:12:25 +0100 |
| commit | 27c310c5c3129aac9d2f325211df85a82177f274 (patch) | |
| tree | c1b74da52455f8740db6504cea4a492c8824b2e8 | |
| parent | 10791233e98fbd0ed84b9ba549ce537ca2fcccf3 (diff) | |
| download | blackbird-op-linux-27c310c5c3129aac9d2f325211df85a82177f274.tar.gz blackbird-op-linux-27c310c5c3129aac9d2f325211df85a82177f274.zip | |
serial: 8250_dma: no need to sync RX buffer
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.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/8250/8250_dma.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c index 21d01a491405..b50307129901 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); @@ -156,9 +153,6 @@ 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; |
