From: Saravana Kannan <saravanak@xxxxxxxxxx>
commit 44e960490ddf868fc9135151c4a658936e771dc2 upstream.
Commit 21c27f06587d ("driver core: Fix SYNC_STATE_ONLY device link
implementation") didn't completely fix STATELESS + SYNC_STATE_ONLY
handling.
What looks like an optimization in that commit is actually a bug that
causes an if condition to always take the else path. This prevents
reordering of devices in the dpm_list when a DL_FLAG_STATELESS device
link is create on top of an existing DL_FLAG_SYNC_STATE_ONLY device
link.
Fixes: 21c27f06587d ("driver core: Fix SYNC_STATE_ONLY device link implementation")
Signed-off-by: Saravana Kannan <saravanak@xxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Link: https://lore.kernel.org/r/20200520043626.181820-1-saravanak@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/base/core.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -360,12 +360,14 @@ struct device_link *device_link_add(stru
if (flags & DL_FLAG_STATELESS) {
kref_get(&link->kref);
- link->flags |= DL_FLAG_STATELESS;
if (link->flags & DL_FLAG_SYNC_STATE_ONLY &&
- !(link->flags & DL_FLAG_STATELESS))
+ !(link->flags & DL_FLAG_STATELESS)) {
+ link->flags |= DL_FLAG_STATELESS;
goto reorder;
- else
+ } else {
+ link->flags |= DL_FLAG_STATELESS;
goto out;
+ }
}
/*
