[PATCH 03/10] drm: exynos_hdmi: use of_get_i2c_adapter_by_node interface

[Vladimir Zapolskiy]

This change is needed to properly lock I2C bus driver, which serves DDC.

On release of_get_i2c_adapter_by_node() requires i2c_put_adapter() call,
which replaces put_device(). By the way added of_node_put(ddc_node) to
eliminate memory leak, if OF_DYNAMIC is enabled.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy at mentor.com>
---
 drivers/gpu/drm/exynos/exynos_hdmi.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c 
b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 99e2864..399eff9 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -2407,7 +2407,8 @@ static int hdmi_probe(struct platform_device *pdev)
        }

 out_get_ddc_adpt:
-       hdata->ddc_adpt = of_find_i2c_adapter_by_node(ddc_node);
+       hdata->ddc_adpt = of_get_i2c_adapter_by_node(ddc_node);
+       of_node_put(ddc_node);
        if (!hdata->ddc_adpt) {
                DRM_ERROR("Failed to get ddc i2c adapter by node\n");
                return -EPROBE_DEFER;
@@ -2485,7 +2486,7 @@ err_hdmiphy:
        if (hdata->hdmiphy_port)
                put_device(&hdata->hdmiphy_port->dev);
 err_ddc:
-       put_device(&hdata->ddc_adpt->dev);
+       i2c_put_adapter(hdata->ddc_adpt);

        return ret;
 }
@@ -2501,7 +2502,7 @@ static int hdmi_remove(struct platform_device *pdev)

        if (hdata->hdmiphy_port)
                put_device(&hdata->hdmiphy_port->dev);
-       put_device(&hdata->ddc_adpt->dev);
+       i2c_put_adapter(hdata->ddc_adpt);

        pm_runtime_disable(&pdev->dev);
        component_del(&pdev->dev, &hdmi_component_ops);
-- 
2.1.4