linux-kernel - [PATCH] clk: keystone: pll: fix a couple NULL vs IS

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Message-ID: <d9da4c97-0da9-499f-9a21-1f8e3f148dc1@moroto.mountain>
Date:   Thu, 5 Oct 2023 17:01:57 +0300
From:   Dan Carpenter <dan.carpenter@...aro.org>
To:     Santosh Shilimkar <santosh.shilimkar@...com>
Cc:     Santosh Shilimkar <ssantosh@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Mike Turquette <mturquette@...aro.org>,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] clk: keystone: pll: fix a couple NULL vs IS_ERR() checks

The clk_register_divider() and clk_register_mux() functions returns
error pointers on error but this code checks for NULL.  Fix that.

Fixes: b9e0d40c0d83 ("clk: keystone: add Keystone PLL clock driver")
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
 drivers/clk/keystone/pll.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/keystone/pll.c b/drivers/clk/keystone/pll.c
index ee5c72369334..6bbdd4705d71 100644
--- a/drivers/clk/keystone/pll.c
+++ b/drivers/clk/keystone/pll.c
@@ -281,12 +281,13 @@ static void __init of_pll_div_clk_init(struct device_node *node)
 
 	clk = clk_register_divider(NULL, clk_name, parent_name, 0, reg, shift,
 				 mask, 0, NULL);
-	if (clk) {
-		of_clk_add_provider(node, of_clk_src_simple_get, clk);
-	} else {
+	if (IS_ERR(clk)) {
 		pr_err("%s: error registering divider %s\n", __func__, clk_name);
 		iounmap(reg);
+		return;
 	}
+
+	of_clk_add_provider(node, of_clk_src_simple_get, clk);
 }
 CLK_OF_DECLARE(pll_divider_clock, "ti,keystone,pll-divider-clock", of_pll_div_clk_init);
 
@@ -328,10 +329,12 @@ static void __init of_pll_mux_clk_init(struct device_node *node)
 	clk = clk_register_mux(NULL, clk_name, (const char **)&parents,
 				ARRAY_SIZE(parents) , 0, reg, shift, mask,
 				0, NULL);
-	if (clk)
-		of_clk_add_provider(node, of_clk_src_simple_get, clk);
-	else
+	if (IS_ERR(clk)) {
 		pr_err("%s: error registering mux %s\n", __func__, clk_name);
+		return;
+	}
+
+	of_clk_add_provider(node, of_clk_src_simple_get, clk);
 }
 CLK_OF_DECLARE(pll_mux_clock, "ti,keystone,pll-mux-clock", of_pll_mux_clk_init);
 
-- 
2.39.2