From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Sun, 29 Jan 2012 10:20:00 +0000 (+0000)
Subject: ARM: sa1111: cleanup sub-device registration and unregistration
X-Git-Tag: v3.4-rc1~83^2^3~10^2~7
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=924e1d4910a1f7d53f949a92a5d7793e572bb21d;p=platform%2Fkernel%2Flinux-3.10.git

ARM: sa1111: cleanup sub-device registration and unregistration

Move the releasing of resources out of the release function - this
allows a cleaner and more conventional arrangement of the registration
failure paths and a saner unregistration process for these devices.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c
index d78499f..8d86338 100644
--- a/arch/arm/common/sa1111.c
+++ b/arch/arm/common/sa1111.c
@@ -610,7 +610,6 @@ static void sa1111_dev_release(struct device *_dev)
 {
 	struct sa1111_dev *dev = SA1111_DEV(_dev);
 
-	release_resource(&dev->res);
 	kfree(dev);
 }
 
@@ -625,9 +624,10 @@ sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
 	dev = kzalloc(sizeof(struct sa1111_dev), GFP_KERNEL);
 	if (!dev) {
 		ret = -ENOMEM;
-		goto out;
+		goto err_alloc;
 	}
 
+	device_initialize(&dev->dev);
 	dev_set_name(&dev->dev, "%4.4lx", info->offset);
 	dev->devid	 = info->devid;
 	dev->dev.parent  = sachip->dev;
@@ -657,17 +657,19 @@ sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
 	if (ret) {
 		printk("SA1111: failed to allocate resource for %s\n",
 			dev->res.name);
-		dev_set_name(&dev->dev, NULL);
-		kfree(dev);
-		goto out;
+		goto err_resource;
 	}
 
-	ret = device_register(&dev->dev);
-	if (ret) {
-		release_resource(&dev->res);
-		kfree(dev);
-	}
+	ret = device_add(&dev->dev);
+	if (ret)
+		goto err_add;
+	return 0;
 
+ err_add:
+	release_resource(&dev->res);
+ err_resource:
+	put_device(&dev->dev);
+ err_alloc:
 	return ret;
 }
 
@@ -813,7 +815,10 @@ __sa1111_probe(struct device *me, struct resource *mem, int irq)
 
 static int sa1111_remove_one(struct device *dev, void *data)
 {
-	device_unregister(dev);
+	struct sa1111_dev *sadev = SA1111_DEV(dev);
+	device_del(&sadev->dev);
+	release_resource(&sadev->res);
+	put_device(&sadev->dev);
 	return 0;
 }