[PATCH v5 2/7] serial: 8250_em: Simplify probe()

[Biju Das <biju.das.jz@bp.renesas.com>]

Simplify probe() by using dev_err_probe() instead of dev_err() and
add a local variable 'dev' to replace '&pdev->dev'.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
v4->v5:
 * Updated commit header and description.
v3->v4:
 * Split from patch#1 
 * Replaced dev_err->dev_err_probe() in probe()
 * Added a local variable 'dev' to replace '&pdev->dev' in probe().
v2->v3:
 * Dropped sclk from priv.
 * Dropped unneeded clk_disable_unprepare from remove().
 * Retained Rb tags from Geert and Andy as the changes are trivial.
v1->v2:
 * replaced devm_clk_get->devm_clk_get_enabled() and updated clk
   handling in probe().
 * Added Rb tag from Geert.
---
 drivers/tty/serial/8250/8250_em.c | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_em.c b/drivers/tty/serial/8250/8250_em.c
index d94c3811a8f7..17c0aa424df8 100644
--- a/drivers/tty/serial/8250/8250_em.c
+++ b/drivers/tty/serial/8250/8250_em.c
@@ -79,6 +79,7 @@ static void serial8250_em_serial_dl_write(struct uart_8250_port *up, int value)
 static int serial8250_em_probe(struct platform_device *pdev)
 {
 	struct serial8250_em_priv *priv;
+	struct device *dev = &pdev->dev;
 	struct uart_8250_port up;
 	struct resource *regs;
 	int irq, ret;
@@ -88,27 +89,23 @@ static int serial8250_em_probe(struct platform_device *pdev)
 		return irq;
 
 	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!regs) {
-		dev_err(&pdev->dev, "missing registers\n");
-		return -EINVAL;
-	}
+	if (!regs)
+		return dev_err_probe(dev, -EINVAL, "missing registers\n");
 
-	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
-	priv->sclk = devm_clk_get(&pdev->dev, "sclk");
-	if (IS_ERR(priv->sclk)) {
-		dev_err(&pdev->dev, "unable to get clock\n");
-		return PTR_ERR(priv->sclk);
-	}
+	priv->sclk = devm_clk_get(dev, "sclk");
+	if (IS_ERR(priv->sclk))
+		return dev_err_probe(dev, PTR_ERR(priv->sclk), "unable to get clock\n");
 
 	memset(&up, 0, sizeof(up));
 	up.port.mapbase = regs->start;
 	up.port.irq = irq;
 	up.port.type = PORT_16750;
 	up.port.flags = UPF_FIXED_PORT | UPF_IOREMAP | UPF_FIXED_TYPE;
-	up.port.dev = &pdev->dev;
+	up.port.dev = dev;
 	up.port.private_data = priv;
 
 	clk_prepare_enable(priv->sclk);
@@ -122,9 +119,8 @@ static int serial8250_em_probe(struct platform_device *pdev)
 
 	ret = serial8250_register_8250_port(&up);
 	if (ret < 0) {
-		dev_err(&pdev->dev, "unable to register 8250 port\n");
 		clk_disable_unprepare(priv->sclk);
-		return ret;
+		return dev_err_probe(dev, ret, "unable to register 8250 port\n");
 	}
 
 	priv->line = ret;
-- 
2.25.1