linux-kernel - [PATCH] thermal: st: Use devm_platform_ioremap_resource() in st_mmap_regmap

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Date:   Wed, 18 Sep 2019 21:43:19 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     linux-pm@...r.kernel.org, Allison Randal <allison@...utok.net>,
        Amit Kucheria <amit.kucheria@...durent.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Eduardo Valentin <edubezval@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Zhang Rui <rui.zhang@...el.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Himanshu Jha <himanshujha199640@...il.com>
Subject: [PATCH] thermal: st: Use devm_platform_ioremap_resource() in
 st_mmap_regmap_init()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 18 Sep 2019 21:32:14 +0200

Simplify this function implementation by using a known wrapper function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/thermal/st/st_thermal_memmap.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/thermal/st/st_thermal_memmap.c b/drivers/thermal/st/st_thermal_memmap.c
index a824b78dabf8..d8ff46abd8eb 100644
--- a/drivers/thermal/st/st_thermal_memmap.c
+++ b/drivers/thermal/st/st_thermal_memmap.c
@@ -121,15 +121,8 @@ static int st_mmap_regmap_init(struct st_thermal_sensor *sensor)
 {
 	struct device *dev = sensor->dev;
 	struct platform_device *pdev = to_platform_device(dev);
-	struct resource *res;

-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "no memory resources defined\n");
-		return -ENODEV;
-	}
-
-	sensor->mmio_base = devm_ioremap_resource(dev, res);
+	sensor->mmio_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(sensor->mmio_base)) {
 		dev_err(dev, "failed to remap IO\n");
 		return PTR_ERR(sensor->mmio_base);
--
2.23.0