[RESEND PATCH v2 2/3] drm: tilcdc: use of_get_i2c_adapter_by_node interface

[Vladimir Zapolskiy]

This change is needed to properly lock I2C bus driver, which serves
DDC, otherwise there is an error in I2C bus driver user counting.

Prior to this change i2c_put_adapter() is misused, which may lead
to an overflow over zero of I2C bus driver user counter.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy at mentor.com>
Cc: Jyri Sarha <jsarha at ti.com>
Cc: Tomi Valkeinen <tomi.valkeinen at ti.com>
---
 drivers/gpu/drm/tilcdc/tilcdc_tfp410.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c 
b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
index 6b8c5b3bf588..73f29dc75d33 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
@@ -331,15 +331,13 @@ static int tfp410_probe(struct platform_device *pdev)
                goto fail;
        }

-       tfp410_mod->i2c = of_find_i2c_adapter_by_node(i2c_node);
+       tfp410_mod->i2c = of_get_i2c_adapter_by_node(i2c_node);
+       of_node_put(i2c_node);
        if (!tfp410_mod->i2c) {
                dev_err(&pdev->dev, "could not get i2c\n");
-               of_node_put(i2c_node);
                goto fail;
        }

-       of_node_put(i2c_node);
-
        tfp410_mod->gpio = of_get_named_gpio_flags(node, "powerdn-gpio",
                        0, NULL);
        if (tfp410_mod->gpio < 0) {
-- 
2.8.1