Don't lock a parent device unless it is needed in device_shutdown. This
is in preparation for making device shutdown asynchronous, when it will
be needed to allow children of a common parent to shut down
simultaneously.
Signed-off-by: Stuart Hayes <[email protected]>
Signed-off-by: David Jeffery <[email protected]>
---
drivers/base/core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 5f4e03336e68..e63177314e86 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -4856,7 +4856,7 @@ void device_shutdown(void)
spin_unlock(&devices_kset->list_lock);
/* hold lock to avoid race with probe/release */
- if (parent)
+ if (parent && dev->bus && dev->bus->need_parent_lock)
device_lock(parent);
device_lock(dev);
@@ -4880,7 +4880,7 @@ void device_shutdown(void)
}
device_unlock(dev);
- if (parent)
+ if (parent && dev->bus && dev->bus->need_parent_lock)
device_unlock(parent);
put_device(dev);
--
2.39.3