linux-kernel - [PATCH 3/5] serial: sprd: Remove unnecessary resource validation

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Date:   Fri, 10 Aug 2018 18:34:25 -0700
From:   Baolin Wang <baolin.wang@...aro.org>
To:     gregkh@...uxfoundation.org, jslaby@...e.com
Cc:     orsonzhai@...il.com, baolin.wang@...aro.org, zhang.lyra@...il.com,
        broonie@...nel.org, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 3/5] serial: sprd: Remove unnecessary resource validation

The devm_ioremap_resource() will valid the resources, thus remove the
unnecessary resource validation in the driver.

Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
 drivers/tty/serial/sprd_serial.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c
index e18d8af..03b0cd4 100644
--- a/drivers/tty/serial/sprd_serial.c
+++ b/drivers/tty/serial/sprd_serial.c
@@ -710,15 +710,12 @@ static int sprd_probe(struct platform_device *pdev)
 		up->uartclk = clk_get_rate(clk);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "not provide mem resource\n");
-		return -ENODEV;
-	}
-	up->mapbase = res->start;
 	up->membase = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(up->membase))
 		return PTR_ERR(up->membase);
 
+	up->mapbase = res->start;
+
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
 		dev_err(&pdev->dev, "not provide irq resource: %d\n", irq);
-- 
1.9.1