linux-kernel - [PATCH 2/2] clk: renesas: Avoid mixing error pointers and NULL

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Date:   Thu, 17 Jun 2021 17:15:10 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        linux-renesas-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 2/2] clk: renesas: Avoid mixing error pointers and NULL

These functions accidentally return both error pointers and NULL when
there is an error.  It doesn't cause a problem but it is confusing and
seems unintentional.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 drivers/clk/renesas/renesas-rzg2l-cpg.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/renesas/renesas-rzg2l-cpg.c b/drivers/clk/renesas/renesas-rzg2l-cpg.c
index 7ba36f19896f..83b58e1cb78f 100644
--- a/drivers/clk/renesas/renesas-rzg2l-cpg.c
+++ b/drivers/clk/renesas/renesas-rzg2l-cpg.c
@@ -124,7 +124,7 @@ rzg2l_cpg_div_clk_register(const struct cpg_core_clk *core,
 						 core->flag, &priv->rmw_lock);
 
 	if (IS_ERR(clk_hw))
-		return NULL;
+		return ERR_CAST(clk_hw);
 
 	return clk_hw->clk;
 }
@@ -174,17 +174,14 @@ rzg2l_cpg_pll_clk_register(const struct cpg_core_clk *core,
 	struct clk_init_data init;
 	const char *parent_name;
 	struct pll_clk *pll_clk;
-	struct clk *clk;
 
 	parent = clks[core->parent & 0xffff];
 	if (IS_ERR(parent))
 		return ERR_CAST(parent);
 
 	pll_clk = devm_kzalloc(dev, sizeof(*pll_clk), GFP_KERNEL);
-	if (!pll_clk) {
-		clk = ERR_PTR(-ENOMEM);
-		return NULL;
-	}
+	if (!pll_clk)
+		return ERR_PTR(-ENOMEM);
 
 	parent_name = __clk_get_name(parent);
 	init.name = core->name;
-- 
2.30.2