From c0c33442f7203704aef345647e14c2fb86071001 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Fri, 26 Mar 2021 12:56:18 +0200 Subject: [PATCH] PM: runtime: Fix ordering in pm_runtime_get_suppliers() rpm_active indicates how many times the supplier usage_count has been incremented. Consequently it must be updated after pm_runtime_get_sync() of the supplier, not before. Fixes: 4c06c4e6cf63 ("driver core: Fix possible supplier PM-usage counter imbalance") Signed-off-by: Adrian Hunter Cc: 5.1+ # 5.1+ Signed-off-by: Rafael J. Wysocki --- drivers/base/power/runtime.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index d54e540..4fde377 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -1690,8 +1690,8 @@ void pm_runtime_get_suppliers(struct device *dev) device_links_read_lock_held()) if (link->flags & DL_FLAG_PM_RUNTIME) { link->supplier_preactivated = true; - refcount_inc(&link->rpm_active); pm_runtime_get_sync(link->supplier); + refcount_inc(&link->rpm_active); } device_links_read_unlock(idx); -- 2.7.4