leds/leds-regulator.c: fix handling of already enabled regulators

Make the driver aware of the initial status of the regulator.

The leds-regulator driver was ignoring the initial status of the
regulator; this resulted in rdev->use_count being incremented to 2 after
calling regulator_led_set_value() in the .probe method when a regulator
was already enabled at insmod time, which made it impossible to ever
disable the regulator.

Signed-off-by: Antonio Ospite <[email protected]>
Cc: Richard Purdie <[email protected]>
Cc: Antonio Ospite <[email protected]>
Acked-by: Mark Brown <[email protected]>
Cc: Liam Girdwood <[email protected]>
Cc: Daniel Ribeiro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Author: Antonio Ospite

drivers/leds/leds-regulator.c

@@ -178,6 +178,10 @@ static int __devinit regulator_led_probe(struct platform_device *pdev)
 	led->cdev.flags |= LED_CORE_SUSPENDRESUME;
 	led->vcc = vcc;
 
+	/* to handle correctly an already enabled regulator */
+	if (regulator_is_enabled(led->vcc))
+		led->enabled = 1;
+
 	mutex_init(&led->mutex);
 	INIT_WORK(&led->work, led_work);