From 6dd54590170efcb6c950a4163960a98a1e07db66 Mon Sep 17 00:00:00 2001 From: Pantelis Antoniou Date: Tue, 16 Dec 2014 19:45:26 +0200 Subject: of/platform: Handle of_populate drivers in notifier When using overlays with drivers calling of_populate the notifier will try to create the device twice. Using the populated bit before proceeding protects against this. Signed-off-by: Pantelis Antoniou Signed-off-by: Grant Likely (cherry picked from commit 15204ab1ebc5aba608cd19c83c37b98438b938b0) Signed-off-by: Alex Shi --- drivers/of/platform.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/of/platform.c b/drivers/of/platform.c index cd87a36495be..0d12451d2652 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -564,6 +564,10 @@ static int of_platform_notify(struct notifier_block *nb, if (!of_node_check_flag(rd->dn->parent, OF_POPULATED_BUS)) return NOTIFY_OK; /* not for us */ + /* already populated? (driver using of_populate manually) */ + if (of_node_check_flag(rd->dn, OF_POPULATED)) + return NOTIFY_OK; + /* pdev_parent may be NULL when no bus platform device */ pdev_parent = of_find_device_by_node(rd->dn->parent); pdev = of_platform_device_create(rd->dn, NULL, @@ -579,6 +583,11 @@ static int of_platform_notify(struct notifier_block *nb, break; case OF_RECONFIG_CHANGE_REMOVE: + + /* already depopulated? */ + if (!of_node_check_flag(rd->dn, OF_POPULATED)) + return NOTIFY_OK; + /* find our device by node */ pdev = of_find_device_by_node(rd->dn); if (pdev == NULL) -- cgit v1.2.3