of_get_child_by_name() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. So add of_node_put() in error paths.

Fixes: format:d8f4a9eda006 ("drm: Add NVIDIA Tegra20 support") Signed-off-by: Miaoqian Lin linmq006@gmail.com --- drivers/gpu/drm/tegra/rgb.c | 31 +++++++++++++++++++++---------- 1 file changed, 21 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/tegra/rgb.c b/drivers/gpu/drm/tegra/rgb.c index ff8fce36d2aa..cef2b1b72385 100644 --- a/drivers/gpu/drm/tegra/rgb.c +++ b/drivers/gpu/drm/tegra/rgb.c @@ -196,12 +196,16 @@ int tegra_dc_rgb_probe(struct tegra_dc *dc) int err;

np = of_get_child_by_name(dc->dev->of_node, "rgb"); - if (!np || !of_device_is_available(np)) - return -ENODEV; + if (!np || !of_device_is_available(np)) { + err = -ENODEV; + goto err_put_node; + }

rgb = devm_kzalloc(dc->dev, sizeof(*rgb), GFP_KERNEL); - if (!rgb) - return -ENOMEM; + if (!rgb) { + err = -ENOMEM; + goto err_put_node; + }

rgb->output.dev = dc->dev; rgb->output.of_node = np; @@ -209,31 +213,34 @@ int tegra_dc_rgb_probe(struct tegra_dc *dc)

err = tegra_output_probe(&rgb->output); if (err < 0) - return err; + goto err_put_node; +

rgb->clk = devm_clk_get(dc->dev, NULL); if (IS_ERR(rgb->clk)) { dev_err(dc->dev, "failed to get clock\n"); - return PTR_ERR(rgb->clk); + err = PTR_ERR(rgb->clk); + goto err_put_node; }

rgb->clk_parent = devm_clk_get(dc->dev, "parent"); if (IS_ERR(rgb->clk_parent)) { dev_err(dc->dev, "failed to get parent clock\n"); - return PTR_ERR(rgb->clk_parent); + err = PTR_ERR(rgb->clk_parent); + goto err_put_node; }

err = clk_set_parent(rgb->clk, rgb->clk_parent); if (err < 0) { dev_err(dc->dev, "failed to set parent clock: %d\n", err); - return err; + goto err_put_node; }

rgb->pll_d_out0 = clk_get_sys(NULL, "pll_d_out0"); if (IS_ERR(rgb->pll_d_out0)) { err = PTR_ERR(rgb->pll_d_out0); dev_err(dc->dev, "failed to get pll_d_out0: %d\n", err); - return err; + goto err_put_node; }

if (dc->soc->has_pll_d2_out0) { @@ -241,13 +248,17 @@ int tegra_dc_rgb_probe(struct tegra_dc *dc) if (IS_ERR(rgb->pll_d2_out0)) { err = PTR_ERR(rgb->pll_d2_out0); dev_err(dc->dev, "failed to get pll_d2_out0: %d\n", err); - return err; + goto err_put_node; } }

dc->rgb = &rgb->output;

return 0; + +err_put_node: + of_node_put(np); + return err; }

int tegra_dc_rgb_remove(struct tegra_dc *dc)