memory: 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/memory/emif.c

@@ -10,6 +10,7 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
+#include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/reboot.h>
 #include <linux/platform_data/emif_plat.h>
@@ -1468,12 +1469,9 @@ static int __init_or_module emif_probe(struct platform_device *pdev)
 		goto error;
 	}
 
-	emif->base = devm_request_and_ioremap(emif->dev, res);
-	if (!emif->base) {
-		dev_err(emif->dev, "%s: devm_request_and_ioremap() failed\n",
-			__func__);
+	emif->base = devm_ioremap_resource(emif->dev, res);
+	if (IS_ERR(emif->base))
 		goto error;
-	}
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {

drivers/memory/tegra20-mc.c

@@ -17,6 +17,7 @@
  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
+#include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/ratelimit.h>
@@ -216,9 +217,9 @@ static int tegra20_mc_probe(struct platform_device *pdev)
 		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
 		if (!res)
 			return -ENODEV;
-		mc->regs[i] = devm_request_and_ioremap(&pdev->dev, res);
-		if (!mc->regs[i])
-			return -EBUSY;
+		mc->regs[i] = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(mc->regs[i]))
+			return PTR_ERR(mc->regs[i]);
 	}
 
 	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);

drivers/memory/tegra30-mc.c

@@ -17,6 +17,7 @@
  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
+#include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/ratelimit.h>
@@ -336,9 +337,9 @@ static int tegra30_mc_probe(struct platform_device *pdev)
 		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
 		if (!res)
 			return -ENODEV;
-		mc->regs[i] = devm_request_and_ioremap(&pdev->dev, res);
-		if (!mc->regs[i])
-			return -EBUSY;
+		mc->regs[i] = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(mc->regs[i]))
+			return PTR_ERR(mc->regs[i]);
 	}
 
 	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);