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| author |   Ulrich Hecht <uli+renesas@fpond.eu> | 2018-10-12 15:47:49 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-15 16:14:48 +0200 |
| commit | c58a3ae58bce99d20fdbc5d97beecf31cc19f3dd (patch) | |
| tree | 0073b7f22146e4237fa3624b86ad4b7c03fda96b /drivers/tty | |
| parent | serial: uartps: Do not allow use aliases >= MAX_UART_INSTANCES (diff) | |
| download | linux-dev-c58a3ae58bce99d20fdbc5d97beecf31cc19f3dd.tar.xz linux-dev-c58a3ae58bce99d20fdbc5d97beecf31cc19f3dd.zip | |
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.c | 2 |
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; } |