drivers/video/exynos/exynos_mipi_dsi.c: convert to devm_ioremap_resou…

…rce()

Use the newly introduced devm_ioremap_resource() instead of
devm_request_and_ioremap() 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: Sachin Kamat <[email protected]>
Cc: Donghwa Lee <[email protected]>
Cc: Florian Tobias Schandinat <[email protected]>
Reviewed-by: Thierry Reding <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

drivers/video/exynos/exynos_mipi_dsi.c

@@ -32,6 +32,7 @@
 #include <linux/notifier.h>
 #include <linux/regulator/consumer.h>
 #include <linux/pm_runtime.h>
+#include <linux/err.h>
 
 #include <video/exynos_mipi_dsim.h>
 
@@ -382,10 +383,9 @@ static int exynos_mipi_dsi_probe(struct platform_device *pdev)
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
-	dsim->reg_base = devm_request_and_ioremap(&pdev->dev, res);
-	if (!dsim->reg_base) {
-		dev_err(&pdev->dev, "failed to remap io region\n");
-		ret = -ENOMEM;
+	dsim->reg_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(dsim->reg_base)) {
+		ret = PTR_ERR(dsim->reg_base);
 		goto error;
 	}