tty: serial: fsl_lpuart: remove sg_set_buf() for sport->rx_sgl

Since .sg_init_one() already set sg entry page like below code.
	sg_init_one()
		sg_init_table(sg, 1);
		sg_set_buf(sg, buf, buflen);

So it should not set sg entry page again, remove the redundant code.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Link: https://lore.kernel.org/r/20190717051930.15514-5-fugang.duan@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 746681be3760e11d47563ddfd8fb8f01b4ae4fb7..ba87b58cce4a6d682dcc07b725326ef4f46fe561 100644 (file)
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1102,7 +1102,6 @@ static inline int lpuart_start_rx_dma(struct lpuart_port *sport)
                return -ENOMEM;
 
        sg_init_one(&sport->rx_sgl, ring->buf, sport->rx_dma_rng_buf_len);
-       sg_set_buf(&sport->rx_sgl, ring->buf, sport->rx_dma_rng_buf_len);
        nent = dma_map_sg(sport->port.dev, &sport->rx_sgl, 1, DMA_FROM_DEVICE);
 
        if (!nent) {