When looking up a backlight device through its firmware node, probe it
if it hasn't already.

The goal is to reduce deferred probes to a minimum, as it makes it very
cumbersome to find out why a device failed to probe, and can introduce
very big delays in when a critical device is probed.

Signed-off-by: Tomeu Vizoso <redacted>
---

Changes in v2: None

 drivers/video/backlight/backlight.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index bddc8b17a4d8..f7151d916435 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c

@@ -559,6 +559,8 @@ struct backlight_device *of_find_backlight_by_node(struct device_node *node)
 {
 	struct device *dev;
 
+	fwnode_ensure_device(&node->fwnode);
+
 	dev = class_find_device(backlight_class, NULL, node, of_parent_match);
 
 	return dev ? to_backlight_device(dev) : NULL;

-- 
2.4.3