Commit d09959e7 authored Dec 04, 2015 by Yoshihiro Shimoda Committed by Greg Kroah-Hartman Dec 12, 2015

serial: sh-sci: Fix length of scatterlist

This patch fixes an issue that the "length" of scatterlist should be
set using sg_dma_len(). Otherwise, a dmaengine driver cannot work
correctly if CONFIG_NEED_SG_DMA_LENGTH=y.

Fixes: 7b39d901 (serial: sh-sci: Fix NULL pointer dereference if HIGHMEM is enabled)
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent ac8f3bf8

drivers/tty/serial/sh-sci.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1437,7 +1437,7 @@ static void sci_request_dma(struct uart_port *port)
		sg_init_table(sg, 1);
		s->rx_buf[i] = buf;
		sg_dma_address(sg) = dma;
		sg->length = s->buf_len_rx;
		sg_dma_len(sg) = s->buf_len_rx;

		buf += s->buf_len_rx;
		dma += s->buf_len_rx;