diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2016-04-10 07:14:34 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-30 18:26:55 +0200 |
| commit | ed183ee689058775b24021272c3a01d356fe8e2e (patch) | |
| tree | 5860a95febd7abfd59668ca55747d6a1c75658f9 /drivers/tty/serial | |
| parent | serial: 8250: Validate dmaengine tx chan meets requirements (diff) | |
| download | linux-ed183ee689058775b24021272c3a01d356fe8e2e.tar.xz linux-ed183ee689058775b24021272c3a01d356fe8e2e.zip | |
serial: omap8250: Drop rx buffer sync
commit 27c310c5c312 ("serial: 8250_dma: no need to sync RX buffer")
notes the RX DMA buffer is allocated from DMA coherent memory, and
thus does not need sync'd for each transaction. The same is true
for OMAP RX DMA.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/8250/8250_omap.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index abeaf5eb1275..ca2a85011916 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -754,9 +754,6 @@ static void __dma_rx_do_complete(struct uart_8250_port *p, bool error) unsigned long flags; int ret; - dma_sync_single_for_cpu(dma->rxchan->device->dev, dma->rx_addr, - dma->rx_size, DMA_FROM_DEVICE); - spin_lock_irqsave(&priv->rx_dma_lock, flags); if (!dma->rx_running) @@ -868,9 +865,6 @@ static int omap_8250_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); out: spin_unlock_irqrestore(&priv->rx_dma_lock, flags); |