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Subject[PATCH v5 06/11] of/platform: Pause/resume sync state in of_platform_populate()
From
When multiple child devices are populated using of_platform_populate()
after kernel init, there could be supplier-consumer dependencies between
the child devices.

Wait for all the devices to be added and linked before calling sync_state()
on all the suppliers.

Signed-off-by: Saravana Kannan <saravanak@google.com>
---
drivers/of/platform.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 56b718f09929..dba962a0ee50 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -486,6 +486,7 @@ int of_platform_populate(struct device_node *root,
pr_debug("%s()\n", __func__);
pr_debug(" starting at: %pOF\n", root);

+ device_links_supplier_sync_state_pause();
for_each_child_of_node(root, child) {
rc = of_platform_bus_create(child, matches, lookup, parent, true);
if (rc) {
@@ -493,6 +494,8 @@ int of_platform_populate(struct device_node *root,
break;
}
}
+ device_links_supplier_sync_state_resume();
+
of_node_set_flag(root, OF_POPULATED_BUS);

of_node_put(root);
--
2.22.0.510.g264f2c817a-goog
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