linux-kernel - [PATCH] nvmem: meson-efuse: fix function pointer type mismatch

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Date: Tue, 13 Feb 2024 11:15:47 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc: Arnd Bergmann <arnd@...db.de>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Kevin Hilman <khilman@...libre.com>,
	Jerome Brunet <jbrunet@...libre.com>,
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-amlogic@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev
Subject: [PATCH] nvmem: meson-efuse: fix function pointer type mismatch

From: Arnd Bergmann <arnd@...db.de>

clang-16 warns about casting functions to incompatible types, as is done
here to call clk_disable_unprepare:

drivers/nvmem/meson-efuse.c:78:12: error: cast from 'void (*)(struct clk *)' to 'void (*)(void *)' converts to incompatible function type [-Werror,-Wcast-function-type-strict]
   78 |                                        (void(*)(void *))clk_disable_unprepare,

Address this with a trivial helper function that adjusts the return code.

Fixes: 611fbca1c861 ("nvmem: meson-efuse: add peripheral clock")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/nvmem/meson-efuse.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/nvmem/meson-efuse.c b/drivers/nvmem/meson-efuse.c
index b922df99f9bc..3b9e31d7d073 100644
--- a/drivers/nvmem/meson-efuse.c
+++ b/drivers/nvmem/meson-efuse.c
@@ -38,6 +38,11 @@ static const struct of_device_id meson_efuse_match[] = {
 };
 MODULE_DEVICE_TABLE(of, meson_efuse_match);
 
+static void meson_efuse_clk_disable(void *clk)
+{
+	clk_disable_unprepare(clk);
+}
+
 static int meson_efuse_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -74,9 +79,7 @@ static int meson_efuse_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = devm_add_action_or_reset(dev,
-				       (void(*)(void *))clk_disable_unprepare,
-				       clk);
+	ret = devm_add_action_or_reset(dev, meson_efuse_clk_disable, clk);
 	if (ret) {
 		dev_err(dev, "failed to add disable callback");
 		return ret;
-- 
2.39.2