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    Subject[PATCH 2/4] mfd: wm8994: Fix unbalanced calls to regulator_bulk_disable()
    Date
    When runtime PM is enabled, regulators are being controlled by the
    driver's suspend and resume callbacks. They are also unconditionally
    enabled at driver's probe(), and disabled in remove() functions. Add
    more calls to runtime PM framework to ensure that the device's runtime
    PM state matches the regulators state:
    1. at the end of probe() function: set runtime PM state to active, so
    there will be no spurious call to resume();
    2. in remove(), ensure that resume() is called before disabling runtime PM
    management and unconditionally disabling the regulators.

    Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
    Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
    ---
    drivers/mfd/wm8994-core.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
    index 737dede4a95c..69d973ec42bf 100644
    --- a/drivers/mfd/wm8994-core.c
    +++ b/drivers/mfd/wm8994-core.c
    @@ -584,6 +584,7 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq)
    goto err_irq;
    }

    + pm_runtime_set_active(wm8994->dev);
    pm_runtime_enable(wm8994->dev);
    pm_runtime_idle(wm8994->dev);

    @@ -603,7 +604,9 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq)

    static void wm8994_device_exit(struct wm8994 *wm8994)
    {
    + pm_runtime_get_sync(wm8994->dev);
    pm_runtime_disable(wm8994->dev);
    + pm_runtime_put_noidle(wm8994->dev);
    wm8994_irq_exit(wm8994);
    regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
    regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
    --
    2.17.1
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