linux-kernel - [PATCH 1/1] nvmem: meson-efuse: fix function pointer type mismatch

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Message-Id: <20240224114023.85535-2-srinivas.kandagatla@linaro.org>
Date: Sat, 24 Feb 2024 11:40:23 +0000
From: srinivas.kandagatla@...aro.org
To: gregkh@...uxfoundation.org
Cc: linux-kernel@...r.kernel.org,
	Jerome Brunet <jbrunet@...libre.com>,
	Stable@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>,
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
	Justin Stitt <justinstitt@...gle.com>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH 1/1] nvmem: meson-efuse: fix function pointer type mismatch

From: Jerome Brunet <jbrunet@...libre.com>

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,

The pattern of getting, enabling and setting a disable callback for a
clock can be replaced with devm_clk_get_enabled(), which also fixes
this warning.

Fixes: 611fbca1c861 ("nvmem: meson-efuse: add peripheral clock")
Cc: <Stable@...r.kernel.org>
Reported-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Acked-by: Arnd Bergmann <arnd@...db.de>
Reviewed-by: Justin Stitt <justinstitt@...gle.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/nvmem/meson-efuse.c | 25 +++----------------------
 1 file changed, 3 insertions(+), 22 deletions(-)

diff --git a/drivers/nvmem/meson-efuse.c b/drivers/nvmem/meson-efuse.c
index b922df99f9bc..33678d0af2c2 100644
--- a/drivers/nvmem/meson-efuse.c
+++ b/drivers/nvmem/meson-efuse.c
@@ -47,7 +47,6 @@ static int meson_efuse_probe(struct platform_device *pdev)
 	struct nvmem_config *econfig;
 	struct clk *clk;
 	unsigned int size;
-	int ret;
 
 	sm_np = of_parse_phandle(pdev->dev.of_node, "secure-monitor", 0);
 	if (!sm_np) {
@@ -60,27 +59,9 @@ static int meson_efuse_probe(struct platform_device *pdev)
 	if (!fw)
 		return -EPROBE_DEFER;
 
-	clk = devm_clk_get(dev, NULL);
-	if (IS_ERR(clk)) {
-		ret = PTR_ERR(clk);
-		if (ret != -EPROBE_DEFER)
-			dev_err(dev, "failed to get efuse gate");
-		return ret;
-	}
-
-	ret = clk_prepare_enable(clk);
-	if (ret) {
-		dev_err(dev, "failed to enable gate");
-		return ret;
-	}
-
-	ret = devm_add_action_or_reset(dev,
-				       (void(*)(void *))clk_disable_unprepare,
-				       clk);
-	if (ret) {
-		dev_err(dev, "failed to add disable callback");
-		return ret;
-	}
+	clk = devm_clk_get_enabled(dev, NULL);
+	if (IS_ERR(clk))
+		return dev_err_probe(dev, PTR_ERR(clk), "failed to get efuse gate");
 
 	if (meson_sm_call(fw, SM_EFUSE_USER_MAX, &size, 0, 0, 0, 0, 0) < 0) {
 		dev_err(dev, "failed to get max user");
-- 
2.25.1