[PATCH v4 6/8] of/platform: Pause/resume sync state in of_platform_populate()
From: Saravana Kannan <hidden>
Date: 2019-07-08 22:56:52
Also in:
lkml
Subsystem:
open firmware and flattened device tree, the rest · Maintainers:
Rob Herring, Saravana Kannan, Linus Torvalds
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 <redacted> --- 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);
--
2.22.0.410.gd8fdbe21b5-goog