linux-kernel - [PATCH] clk: at91: Use of_property_count_u32

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Message-ID: <20240731201407.1838385-7-robh@kernel.org>
Date: Wed, 31 Jul 2024 14:14:02 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Nicolas Ferre <nicolas.ferre@...rochip.com>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Claudiu Beznea <claudiu.beznea@...on.dev>
Cc: linux-clk@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] clk: at91: Use of_property_count_u32_elems() to get property length

Replace of_get_property() with the type specific
of_property_count_u32_elems() to get the property length.

This is part of a larger effort to remove callers of of_get_property()
and similar functions. of_get_property() leaks the DT property data
pointer which is a problem for dynamically allocated nodes which may
be freed.

Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
 drivers/clk/at91/dt-compat.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/at91/dt-compat.c b/drivers/clk/at91/dt-compat.c
index a32dc2111b90..f5a5f9ba7634 100644
--- a/drivers/clk/at91/dt-compat.c
+++ b/drivers/clk/at91/dt-compat.c
@@ -563,9 +563,10 @@ of_at91_clk_pll_get_characteristics(struct device_node *np)
 	if (num_cells < 2 || num_cells > 4)
 		return NULL;
 
-	if (!of_get_property(np, "atmel,pll-clk-output-ranges", &tmp))
+	num_output = of_property_count_u32_elems(np, "atmel,pll-clk-output-ranges");
+	if (num_output <= 0)
 		return NULL;
-	num_output = tmp / (sizeof(u32) * num_cells);
+	num_output /= num_cells;
 
 	characteristics = kzalloc(sizeof(*characteristics), GFP_KERNEL);
 	if (!characteristics)
-- 
2.43.0