gpio: Convert to devm_ioremap_resource()

Convert all uses of devm_request_and_ioremap() to the newly introduced
devm_ioremap_resource() which provides more consistent error handling.

devm_ioremap_resource() provides its own error messages so all explicit
error messages can be removed from the failure code paths.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/gpio/gpio-mvebu.c

@@ -33,6 +33,7 @@
  *   interrupts.
  */
 
+#include <linux/err.h>
 #include <linux/module.h>
 #include <linux/gpio.h>
 #include <linux/irq.h>
@@ -544,11 +545,10 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
 	mvchip->chip.of_node = np;
 
 	spin_lock_init(&mvchip->lock);
-	mvchip->membase = devm_request_and_ioremap(&pdev->dev, res);
+	mvchip->membase = devm_ioremap_resource(&pdev->dev, res);
-	if (! mvchip->membase) {
+	if (IS_ERR(mvchip->membase)) {
-		dev_err(&pdev->dev, "Cannot ioremap\n");
 		kfree(mvchip->chip.label);
-		return -ENOMEM;
+		return PTR_ERR(mvchip->membase);
 	}
 
 	/* The Armada XP has a second range of registers for the
@@ -561,11 +561,11 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
 			return -ENODEV;
 		}
 
-		mvchip->percpu_membase = devm_request_and_ioremap(&pdev->dev, res);
+		mvchip->percpu_membase = devm_ioremap_resource(&pdev->dev,
-		if (! mvchip->percpu_membase) {
+							       res);
-			dev_err(&pdev->dev, "Cannot ioremap\n");
+		if (IS_ERR(mvchip->percpu_membase)) {
 			kfree(mvchip->chip.label);
-			return -ENOMEM;
+			return PTR_ERR(mvchip->percpu_membase);
 		}
 	}
 

drivers/gpio/gpio-mxs.c

@@ -20,6 +20,7 @@
  * MA  02110-1301, USA.
  */
 
+#include <linux/err.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
@@ -253,12 +254,14 @@ static int mxs_gpio_probe(struct platform_device *pdev)
 			parent = of_get_parent(np);
 			base = of_iomap(parent, 0);
 			of_node_put(parent);
+			if (!base)
+				return -EADDRNOTAVAIL;
 		} else {
 			iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-			base = devm_request_and_ioremap(&pdev->dev, iores);
+			base = devm_ioremap_resource(&pdev->dev, iores);
+			if (IS_ERR(base))
+				return PTR_ERR(base);
 		}
-		if (!base)
-			return -EADDRNOTAVAIL;
 	}
 	port->base = base;
 

drivers/gpio/gpio-spear-spics.c

@@ -140,11 +140,9 @@ static int spics_gpio_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	spics->base = devm_request_and_ioremap(&pdev->dev, res);
+	spics->base = devm_ioremap_resource(&pdev->dev, res);
-	if (!spics->base) {
+	if (IS_ERR(spics->base))
-		dev_err(&pdev->dev, "request and ioremap fail\n");
+		return PTR_ERR(spics->base);
-		return -ENOMEM;
-	}
 
 	if (of_property_read_u32(np, "st-spics,peripcfg-reg",
 				&spics->perip_cfg))

drivers/gpio/gpio-stp-xway.c

@@ -214,11 +214,10 @@ static int xway_stp_probe(struct platform_device *pdev)
 	if (!chip)
 		return -ENOMEM;
 
-	chip->virt = devm_request_and_ioremap(&pdev->dev, res);
+	chip->virt = devm_ioremap_resource(&pdev->dev, res);
-	if (!chip->virt) {
+	if (IS_ERR(chip->virt))
-		dev_err(&pdev->dev, "failed to remap STP memory\n");
+		return PTR_ERR(chip->virt);
-		return -ENOMEM;
+	
-	}
 	chip->gc.dev = &pdev->dev;
 	chip->gc.label = "stp-xway";
 	chip->gc.direction_output = xway_stp_dir_out;

drivers/gpio/gpio-tegra.c

@@ -17,6 +17,7 @@
  *
  */
 
+#include <linux/err.h>
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
@@ -450,11 +451,9 @@ static int tegra_gpio_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	regs = devm_request_and_ioremap(&pdev->dev, res);
+	regs = devm_ioremap_resource(&pdev->dev, res);
-	if (!regs) {
+	if (IS_ERR(regs))
-		dev_err(&pdev->dev, "Couldn't ioremap regs\n");
+		return PTR_ERR(regs);
-		return -ENODEV;
-	}
 
 	for (i = 0; i < tegra_gpio_bank_count; i++) {
 		for (j = 0; j < 4; j++) {