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    Subject[PATCH v6 13/22] backlight: Probe backlight devices on demand
    Date
    When looking up a backlight device through its OF 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 <tomeu.vizoso@collabora.com>
    ---


    drivers/video/backlight/backlight.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
    index bddc8b17a4d8..9bcdc16eacdf 100644
    --- a/drivers/video/backlight/backlight.c
    +++ b/drivers/video/backlight/backlight.c
    @@ -16,6 +16,7 @@
    #include <linux/err.h>
    #include <linux/fb.h>
    #include <linux/slab.h>
    +#include <linux/of_device.h>

    #ifdef CONFIG_PMAC_BACKLIGHT
    #include <asm/backlight.h>
    @@ -559,6 +560,8 @@ struct backlight_device *of_find_backlight_by_node(struct device_node *node)
    {
    struct device *dev;

    + of_device_probe(node);
    +
    dev = class_find_device(backlight_class, NULL, node, of_parent_match);

    return dev ? to_backlight_device(dev) : NULL;
    --
    2.4.3


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