linux-kernel - [PATCH v4 4/4] base/platform: Remove code duplication

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Date:	Thu, 23 Apr 2015 15:58:14 +0200
From:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jakub Sitnicki <jsitnicki@...il.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Mike Travis <travis@....com>,
	Thierry Reding <treding@...dia.com>,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Cc:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
Subject: [PATCH v4 4/4] base/platform: Remove code duplication

Failure path of platform_device_add was almost the same as
platform_device_del. Refactor same code in a function.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
---
 drivers/base/platform.c | 60 +++++++++++++++++++++----------------------------
 1 file changed, 25 insertions(+), 35 deletions(-)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 2e7e904..152d84d 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -298,6 +298,25 @@ int platform_device_add_data(struct platform_device *pdev, const void *data,
 }
 EXPORT_SYMBOL_GPL(platform_device_add_data);
 
+static void platform_device_cleanout(struct platform_device *pdev, int n_res)
+{
+	int i;
+
+	if (pdev->id_auto) {
+		ida_simple_remove(&platform_devid_ida, pdev->id);
+		pdev->id = PLATFORM_DEVID_AUTO;
+	}
+
+	for (i = 0; i < n_res; i++) {
+		struct resource *r = &pdev->resource[i];
+		unsigned long type = resource_type(r);
+
+		if ((type == IORESOURCE_MEM || type == IORESOURCE_IO) &&
+				r->parent)
+			release_resource(r);
+	}
+}
+
 /**
  * platform_device_add - add a platform device to device hierarchy
  * @pdev: platform device we're adding
@@ -371,23 +390,8 @@ int platform_device_add(struct platform_device *pdev)
 		 dev_name(&pdev->dev), dev_name(pdev->dev.parent));
 
 	ret = device_add(&pdev->dev);
-	if (ret == 0)
-		return ret;
-
-	/* Failure path */
-	if (pdev->id_auto) {
-		ida_simple_remove(&platform_devid_ida, pdev->id);
-		pdev->id = PLATFORM_DEVID_AUTO;
-	}
-
-	while (--i >= 0) {
-		struct resource *r = &pdev->resource[i];
-		unsigned long type = resource_type(r);
-
-		if ((type == IORESOURCE_MEM || type == IORESOURCE_IO) &&
-				r->parent)
-			release_resource(r);
-	}
+	if (ret)
+		platform_device_cleanout(pdev, i);
 
 	return ret;
 }
@@ -403,25 +407,11 @@ EXPORT_SYMBOL_GPL(platform_device_add);
  */
 void platform_device_del(struct platform_device *pdev)
 {
-	int i;
-
-	if (pdev) {
-		device_del(&pdev->dev);
-
-		if (pdev->id_auto) {
-			ida_simple_remove(&platform_devid_ida, pdev->id);
-			pdev->id = PLATFORM_DEVID_AUTO;
-		}
-
-		for (i = 0; i < pdev->num_resources; i++) {
-			struct resource *r = &pdev->resource[i];
-			unsigned long type = resource_type(r);
+	if (!pdev)
+		return;
 
-			if ((type == IORESOURCE_MEM || type == IORESOURCE_IO) &&
-					r->parent)
-				release_resource(r);
-		}
-	}
+	device_del(&pdev->dev);
+	platform_device_cleanout(pdev, pdev->num_resources);
 }
 EXPORT_SYMBOL_GPL(platform_device_del);
 
-- 
2.1.4

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