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Commit 27c310c5 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Greg Kroah-Hartman
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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: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 10791233

drivers/tty/serial/8250/8250_dma.c

+0 −6
Original line number Diff line number Diff line
@@ -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;