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authorUlrich Hecht <uli+renesas@fpond.eu>2018-10-12 15:47:49 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-10-15 16:14:48 +0200
commitc58a3ae58bce99d20fdbc5d97beecf31cc19f3dd (patch)
tree0073b7f22146e4237fa3624b86ad4b7c03fda96b /drivers/tty
parent2088cfd882d0403609bdf426e9b24372fe1b8337 (diff)
downloadlinux-c58a3ae58bce99d20fdbc5d97beecf31cc19f3dd.tar.bz2
serial: sh-sci: do not warn if DMA transfers are not supported
Not all (H)SCIF devices support DMA, and failure to set it up is not normally a cause for concern. This patch demotes the associated warning to debug output. Inspired by BSP patch "sci: sh-sci: Fix transfer sequence of unsupport DMA transfer" (6beb1f98d3bd30) by Hiromitsu Yamasaki. Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/sh-sci.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 426241da2e44..ff6ba6d86cd8 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1516,7 +1516,7 @@ static struct dma_chan *sci_request_dma_chan(struct uart_port *port,
chan = dma_request_slave_channel(port->dev,
dir == DMA_MEM_TO_DEV ? "tx" : "rx");
if (!chan) {
- dev_warn(port->dev, "dma_request_slave_channel failed\n");
+ dev_dbg(port->dev, "dma_request_slave_channel failed\n");
return NULL;
}