diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2021-03-26 12:56:18 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-03-29 19:27:09 +0200 |
| commit | c0c33442f7203704aef345647e14c2fb86071001 (patch) | |
| tree | 3fbaa2ded7c272a6869b18bf2ffd87d638a328db /drivers/base/power/runtime.c | |
| parent | a5e13c6df0e41702d2b2c77c8ad41677ebb065b3 (diff) | |
| download | linux-c0c33442f7203704aef345647e14c2fb86071001.tar.bz2 | |
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 <adrian.hunter@intel.com>
Cc: 5.1+ <stable@vger.kernel.org> # 5.1+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base/power/runtime.c')
| -rw-r--r-- | drivers/base/power/runtime.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index d54e540067bf..4fde37713c58 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); |