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Commit 4c0be45b authored by Andrew Jackson's avatar Andrew Jackson Committed by Greg Kroah-Hartman
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serial: pl011: Allocate TX DMA buffer from DMA capable memory 



Allocating with __GFP_DMA avoids the need for bounce buffers

Signed-off-by: default avatarAndrew Jackson <Andrew.Jackson@arm.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 144c29ed

drivers/tty/serial/amba-pl011.c

+1 −1
Original line number Diff line number Diff line
@@ -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;