Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.6 179/606] driver core: Fix handling of SYNC_STATE_ONLY + STATELESS device links | Date | Mon, 8 Jun 2020 19:05:04 -0400 |
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From: Saravana Kannan <saravanak@google.com>
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@google.com> Cc: stable <stable@vger.kernel.org> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Link: https://lore.kernel.org/r/20200520043626.181820-1-saravanak@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/base/core.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/base/core.c b/drivers/base/core.c index 7fb7ffdeb015..68277687c160 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -360,12 +360,14 @@ struct device_link *device_link_add(struct device *consumer, 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; + } } /* -- 2.25.1
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