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authorGrant Likely <grant.likely@linaro.org>2014-11-20 01:35:39 +0300
committerGrant Likely <grant.likely@linaro.org>2014-11-20 13:51:18 +0300
commit2d0747c4b68be8eb8ccfa2c538f2f5dd2ea89094 (patch)
treea52d97a377369b58a018488a15d700652bec6e74 /drivers/of
parent08d53aa58cb162e65e25dbe31d28438657cb8e33 (diff)
downloadlinux-2d0747c4b68be8eb8ccfa2c538f2f5dd2ea89094.tar.xz
of: Properly set the OF_POPULATED_BUS flag on root node
of_platform_populate() takes a subset of the device tree and turns it into a set of platform_devices. At the same time it sets the OF_POPULATED_BUS flag in each bus nodes so that of_platform_depopulate() can undo the operation at a later time. However, it doesn't set the flag on the root of the population tree which means that dynamic modifications of the device tree at runtime will not create/destroy devices correctly. Fix of_platform_populate() to set the OF_POPULATED_BUS flag on the node it is called with. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Cc: Pawel Moll <pawel.moll@arm.com>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/platform.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 7c6771986c06..656cccf0e680 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -500,6 +500,7 @@ int of_platform_populate(struct device_node *root,
if (rc)
break;
}
+ of_node_set_flag(root, OF_POPULATED_BUS);
of_node_put(root);
return rc;
@@ -542,7 +543,10 @@ static int of_platform_device_destroy(struct device *dev, void *data)
*/
void of_platform_depopulate(struct device *parent)
{
- device_for_each_child(parent, NULL, of_platform_device_destroy);
+ if (parent->of_node && of_node_check_flag(parent->of_node, OF_POPULATED_BUS)) {
+ device_for_each_child(parent, NULL, of_platform_device_destroy);
+ of_node_clear_flag(parent->of_node, OF_POPULATED_BUS);
+ }
}
EXPORT_SYMBOL_GPL(of_platform_depopulate);