[PATCH v2] base: core: Remove WARN_ON from link dependencies check

From: Benjamin Gaignard
Date: Mon Jul 16 2018 - 06:00:08 EST


In some cases the link between between customer and supplier
already exist, for example when a device use it parent as supplier [1].
Do not warn about already existing dependencies because device_link_add()
take care of this case.

[1] https://lkml.org/lkml/2018/7/9/356

Reported-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Reviewed-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxx>
---
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 df3e1a44707a..fcdc17f0f349 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -105,7 +105,7 @@ static int device_is_dependent(struct device *dev, void *target)
struct device_link *link;
int ret;

- if (WARN_ON(dev == target))
+ if (dev == target)
return 1;

ret = device_for_each_child(dev, target, device_is_dependent);
@@ -113,7 +113,7 @@ static int device_is_dependent(struct device *dev, void *target)
return ret;

list_for_each_entry(link, &dev->links.consumers, s_node) {
- if (WARN_ON(link->consumer == target))
+ if (link->consumer == target)
return 1;

ret = device_is_dependent(link->consumer, target);
--
2.15.0