These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / tty / serial / 8250 / 8250_dma.c

diff --git a/kernel/drivers/tty/serial/8250/8250_dma.c b/kernel/drivers/tty/serial/8250/8250_dma.c
index 21d01a4..78259d3 100644 (file)
--- a/kernel/drivers/tty/serial/8250/8250_dma.c
+++ b/kernel/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);
 
@@ -80,10 +77,6 @@ int serial8250_tx_dma(struct uart_8250_port *p)
                return 0;
 
        dma->tx_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
-       if (dma->tx_size < p->port.fifosize) {
-               ret = -EINVAL;
-               goto err;
-       }
 
        desc = dmaengine_prep_slave_single(dma->txchan,
                                           dma->tx_addr + xmit->tail,
@@ -156,9 +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;