This is a preparatory for the serial-to-kfifo switch. kfifo understands
only scatter-gatter approach, so switch to that.
No functional change intended, it's just dmaengine_prep_slave_single()
inline expanded.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@xxxxxxxxxx>
---
drivers/tty/serial/8250/8250_omap.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c
index 66901d93089a..879e77b30701 100644
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -1140,6 +1140,7 @@ static int omap_8250_tx_dma(struct uart_8250_port *p)
struct omap8250_priv *priv = p->port.private_data;
struct circ_buf *xmit = &p->port.state->xmit;
struct dma_async_tx_descriptor *desc;
+ struct scatterlist sg;
unsigned int skip_byte = 0;
int ret;
@@ -1191,9 +1192,11 @@ static int omap_8250_tx_dma(struct uart_8250_port *p)
skip_byte = 1;
}
- desc = dmaengine_prep_slave_single(dma->txchan,
- dma->tx_addr + xmit->tail + skip_byte,
- dma->tx_size - skip_byte, DMA_MEM_TO_DEV,
+ sg_init_table(&sg, 1);
+ sg_dma_address(&sg) = dma->tx_addr + xmit->tail + skip_byte;
+ sg_dma_len(&sg) = dma->tx_size - skip_byte;
+
+ desc = dmaengine_prep_slave_sg(dma->txchan, &sg, 1, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
ret = -EBUSY;
--
2.44.0
