[PATCH AUTOSEL 5.10 011/137] clk: renesas: rcar-usb2-clock-sel: Fix error handling in .probe()
From: Sasha Levin <sashal@kernel.org>
Date: 2021-07-06 12:24:12
Also in:
linux-renesas-soc, lkml, stable
Subsystem:
common clk framework, renesas clock drivers, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Geert Uytterhoeven, Linus Torvalds
From: Dinghao Liu <redacted> [ Upstream commit a20a40a8bbc2cf4b29d7248ea31e974e9103dd7f ] The error handling paths after pm_runtime_get_sync() have no refcount decrement, which leads to refcount leak. Signed-off-by: Dinghao Liu <redacted> Link: https://lore.kernel.org/r/20210415073338.22287-1-dinghao.liu@zju.edu.cn (local) [geert: Remove now unused variable priv] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/clk/renesas/rcar-usb2-clock-sel.c | 24 ++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-)
diff --git a/drivers/clk/renesas/rcar-usb2-clock-sel.c b/drivers/clk/renesas/rcar-usb2-clock-sel.c
index d4c02986c34e..0ccc6e709a38 100644
--- a/drivers/clk/renesas/rcar-usb2-clock-sel.c
+++ b/drivers/clk/renesas/rcar-usb2-clock-sel.c@@ -128,10 +128,8 @@ static int rcar_usb2_clock_sel_resume(struct device *dev) static int rcar_usb2_clock_sel_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct usb2_clock_sel_priv *priv = platform_get_drvdata(pdev); of_clk_del_provider(dev->of_node); - clk_hw_unregister(&priv->hw); pm_runtime_put(dev); pm_runtime_disable(dev);
@@ -164,9 +162,6 @@ static int rcar_usb2_clock_sel_probe(struct platform_device *pdev) if (IS_ERR(priv->rsts)) return PTR_ERR(priv->rsts); - pm_runtime_enable(dev); - pm_runtime_get_sync(dev); - clk = devm_clk_get(dev, "usb_extal"); if (!IS_ERR(clk) && !clk_prepare_enable(clk)) { priv->extal = !!clk_get_rate(clk);
@@ -183,6 +178,8 @@ static int rcar_usb2_clock_sel_probe(struct platform_device *pdev) return -ENOENT; } + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); platform_set_drvdata(pdev, priv); dev_set_drvdata(dev, priv);
@@ -193,11 +190,20 @@ static int rcar_usb2_clock_sel_probe(struct platform_device *pdev) init.num_parents = 0; priv->hw.init = &init; - clk = clk_register(NULL, &priv->hw); - if (IS_ERR(clk)) - return PTR_ERR(clk); + ret = devm_clk_hw_register(NULL, &priv->hw); + if (ret) + goto pm_put; + + ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, &priv->hw); + if (ret) + goto pm_put; + + return 0; - return of_clk_add_hw_provider(np, of_clk_hw_simple_get, &priv->hw); +pm_put: + pm_runtime_put(dev); + pm_runtime_disable(dev); + return ret; } static const struct dev_pm_ops rcar_usb2_clock_sel_pm_ops = {
--
2.30.2