From 4c0be45b18a3bd5c215589c4b320648e35024f6e Mon Sep 17 00:00:00 2001 From: Andrew Jackson Date: Fri, 7 Nov 2014 14:14:35 +0000 Subject: [PATCH] serial: pl011: Allocate TX DMA buffer from DMA capable memory Allocating with __GFP_DMA avoids the need for bounce buffers Signed-off-by: Andrew Jackson Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/amba-pl011.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 83c8f721cdb2..8654049a70c0 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -988,7 +988,7 @@ static void pl011_dma_startup(struct uart_amba_port *uap) if (!uap->dmatx.chan) return; - uap->dmatx.buf = kmalloc(PL011_DMA_BUFFER_SIZE, GFP_KERNEL); + uap->dmatx.buf = kmalloc(PL011_DMA_BUFFER_SIZE, GFP_KERNEL | __GFP_DMA); if (!uap->dmatx.buf) { dev_err(uap->port.dev, "no memory for DMA TX buffer\n"); uap->port.fifosize = uap->fifosize; -- 2.20.1