[PATCH v5 06/11] of/platform: Pause/resume sync state in of_platform_populate()

[Saravana Kannan]

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 <sarava...@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