[media] exynos-gsc: Fixup clock management at ->remove()

To make sure the clock is fully gated in ->remove(), we first need to
to bring the device into full power by invoking pm_runtime_get_sync().

Then, let's both unprepare and disable the clock.

[mszyprow: rebased onto v4.9-rc4]

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/platform/exynos-gsc/gsc-core.c b/drivers/media/platform/exynos-gsc/gsc-core.c
index 19fcbc7..e627653 100644 (file)
--- a/drivers/media/platform/exynos-gsc/gsc-core.c
+++ b/drivers/media/platform/exynos-gsc/gsc-core.c
@@ -1095,12 +1095,15 @@ static int gsc_remove(struct platform_device *pdev)
 {
        struct gsc_dev *gsc = platform_get_drvdata(pdev);
 
+       pm_runtime_get_sync(&pdev->dev);
+
        gsc_unregister_m2m_device(gsc);
        v4l2_device_unregister(&gsc->v4l2_dev);
 
        vb2_dma_contig_clear_max_seg_size(&pdev->dev);
-       pm_runtime_disable(&pdev->dev);
-       clk_unprepare(gsc->clock);
+       clk_disable_unprepare(gsc->clock);
+
+       pm_runtime_put_noidle(&pdev->dev);
 
        dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
        return 0;