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authorZhen Lei <thunder.leizhen@huawei.com>2015-08-25 12:08:22 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-10-17 22:11:50 -0700
commit56f2de81e020c537f7e35550d13840143cb765cd (patch)
tree7863e4bfe65656253a9f456bc704a1f4729c6a2c /drivers/of/device.c
parent6713e8fb541656d00249dca6627395b461c39ece (diff)
downloadlinux-56f2de81e020c537f7e35550d13840143cb765cd.tar.gz
of: to support binding numa node to specified device in devicetree
For now, in function device_add, the new device will be forced to
inherit the numa node of its parent. But this will override the device's
numa node which configured in devicetree.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/of/device.c')
-rw-r--r--drivers/of/device.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/of/device.c b/drivers/of/device.c
index 8b91ea241b10..e5f47cec75f3 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -60,11 +60,12 @@ int of_device_add(struct platform_device *ofdev)
 	ofdev->name = dev_name(&ofdev->dev);
 	ofdev->id = -1;
 
-	/* device_add will assume that this device is on the same node as
-	 * the parent. If there is no parent defined, set the node
-	 * explicitly */
-	if (!ofdev->dev.parent)
-		set_dev_node(&ofdev->dev, of_node_to_nid(ofdev->dev.of_node));
+	/*
+	 * If this device has not binding numa node in devicetree, that is
+	 * of_node_to_nid returns NUMA_NO_NODE. device_add will assume that this
+	 * device is on the same node as the parent.
+	 */
+	set_dev_node(&ofdev->dev, of_node_to_nid(ofdev->dev.of_node));
 
 	return device_add(&ofdev->dev);
 }