[PATCH] serial: sh-sci: convert not to use dma_request_slave_channel()

[Christophe JAILLET]

dma_request_slave_channel() is deprecated. dma_request_chan() should
be used directly instead.

Switch to the preferred function and update the error handling accordingly.

Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
---
This patch is NOT compile tested. I've not been able to find a correct
setting so that CONFIG_SERIAL_SH_SCI_DMA is set.
---
 drivers/tty/serial/sh-sci.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 84ab434c94ba..b2cc2c1a111e 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1558,10 +1558,9 @@ static struct dma_chan *sci_request_dma_chan(struct uart_port *port,
 	struct dma_slave_config cfg;
 	int ret;
 
-	chan = dma_request_slave_channel(port->dev,
-					 dir == DMA_MEM_TO_DEV ? "tx" : "rx");
-	if (!chan) {
-		dev_dbg(port->dev, "dma_request_slave_channel failed\n");
+	chan = dma_request_chan(port->dev, dir == DMA_MEM_TO_DEV ? "tx" : "rx");
+	if (IS_ERR(chan)) {
+		dev_dbg(port->dev, "dma_request_chan failed\n");
 		return NULL;
 	}
 
-- 
2.34.1