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: 7b39d90184 (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>

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 960e50a97558cff52a1fb9eb8ed8879a5238991c..51c7507b0444957bcbc9c2c832bd6048a5f3b596 100644 (file)
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -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;