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 -- _______________________________________________ linux-yocto mailing list linux-yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/linux-yocto