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authorHeikki Krogerus <heikki.krogerus@linux.intel.com>2013-04-10 16:58:26 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-04-11 13:19:26 -0700
commite4fb3b88ebf21e6127ed0e91336752352ba0931e (patch)
treedea1621d148121e5e8110efbbf53b4ecf5c4325f /drivers/tty
parent75df022b5f8982a375adb04e9e4c0a34a9689ed9 (diff)
serial: 8250_dma: Use dmaengine helpers to get the slave channels
The helper functions in dmaengine API allow the drivers to request slave channels without the filter parameters. They will attempt to extract the needed DMA client information from DT or ACPI, but if such information is not available the filter parameters can still be used. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/8250/8250_dma.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c
index 66430614510..fdb6139e8c1 100644
--- a/drivers/tty/serial/8250/8250_dma.c
+++ b/drivers/tty/serial/8250/8250_dma.c
@@ -156,14 +156,18 @@ int serial8250_request_dma(struct uart_8250_port *p)
dma_cap_set(DMA_SLAVE, mask);
/* Get a channel for RX */
- dma->rxchan = dma_request_channel(mask, dma->fn, dma->rx_param);
+ dma->rxchan = dma_request_slave_channel_compat(mask,
+ dma->fn, dma->rx_param,
+ p->port.dev, "rx");
if (!dma->rxchan)
return -ENODEV;
dmaengine_slave_config(dma->rxchan, &dma->rxconf);
/* Get a channel for TX */
- dma->txchan = dma_request_channel(mask, dma->fn, dma->tx_param);
+ dma->txchan = dma_request_slave_channel_compat(mask,
+ dma->fn, dma->tx_param,
+ p->port.dev, "tx");
if (!dma->txchan) {
dma_release_channel(dma->rxchan);
return -ENODEV;