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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>
This commit is contained in:
Grant Likely 2014-11-19 22:35:39 +00:00
parent 08d53aa58c
commit 2d0747c4b6
1 changed files with 5 additions and 1 deletions
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6
drivers/of/platform.c
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@ -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);