tty: serial: sh-sci: Remove setting {src,dst}_{addr,addr_width} based…

… on DMA direction

The direction field in the DMA config is deprecated. The sh-sci driver
sets {src,dst}_{addr,addr_width} based on the DMA direction and
it results in dmaengine_slave_config() failure as RZ DMAC driver
validates {src,dst}_addr_width values independent of DMA direction.

Fix this issue by passing both {src,dst}_{addr,addr_width}
values independent of DMA direction.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20230322074717.6057-1-biju.das.jz@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/sh-sci.c

@@ -1530,15 +1530,12 @@ static struct dma_chan *sci_request_dma_chan(struct uart_port *port,
 
 	memset(&cfg, 0, sizeof(cfg));
 	cfg.direction = dir;
-	if (dir == DMA_MEM_TO_DEV) {
-		cfg.dst_addr = port->mapbase +
-			(sci_getreg(port, SCxTDR)->offset << port->regshift);
-		cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
-	} else {
-		cfg.src_addr = port->mapbase +
-			(sci_getreg(port, SCxRDR)->offset << port->regshift);
-		cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
-	}
+	cfg.dst_addr = port->mapbase +
+		(sci_getreg(port, SCxTDR)->offset << port->regshift);
+	cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
+	cfg.src_addr = port->mapbase +
+		(sci_getreg(port, SCxRDR)->offset << port->regshift);
+	cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
 
 	ret = dmaengine_slave_config(chan, &cfg);
 	if (ret) {