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From: Simon Horman <horms@kernel.org>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Neil Armstrong <neil.armstrong@linaro.org>,
	 Kevin Hilman <khilman@baylibre.com>,
	Jerome Brunet <jbrunet@baylibre.com>,
	 Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	 Nathan Chancellor <nathan@kernel.org>,
	 Nick Desaulniers <ndesaulniers@google.com>,
	Tom Rix <trix@redhat.com>,
	 linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	 linux-amlogic@lists.infradead.org, llvm@lists.linux.dev,
	 Simon Horman <horms@kernel.org>
Subject: [PATCH] mmc: meson-mx-sdhc: Avoid cast to incompatible function type
Date: Wed, 10 May 2023 14:39:00 +0200	[thread overview]
Message-ID: <20230510-mmc-sdhci-msm-function-cast-v1-1-5ae634b24fbd@kernel.org> (raw)

Rather than casting mmc_free_host to an incompatible function type,
provide a trivial wrapper with the correct signature for the use-case.

Reported by clang-16 with W=1:

 .../meson-mx-sdhc-mmc.c:791:38: error: cast from 'void (*)(struct mmc_host *)' to 'void (*)(void *)' converts to incompatible function type [-Werror,-Wcast-function-type-strict]
         ret = devm_add_action_or_reset(dev, (void(*)(void *))mmc_free_host,
                                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 ./include/linux/device.h:265:38: note: expanded from macro 'devm_add_action_or_reset'
         __devm_add_action_or_reset(release, action, data, #action)
                                            ^~~~~~

The same approach is taken in litex_mmc.c with the function
litex_mmc_free_host_wrapper(). There may be scope for consolidation.

No functional change intended.
Compile tested only.

Signed-off-by: Simon Horman <horms@kernel.org>
---
 drivers/mmc/host/meson-mx-sdhc-mmc.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/meson-mx-sdhc-mmc.c b/drivers/mmc/host/meson-mx-sdhc-mmc.c
index da85c2f2acb8..97168cdfa8e9 100644
--- a/drivers/mmc/host/meson-mx-sdhc-mmc.c
+++ b/drivers/mmc/host/meson-mx-sdhc-mmc.c
@@ -776,6 +776,11 @@ static void meson_mx_sdhc_init_hw(struct mmc_host *mmc)
 	regmap_write(host->regmap, MESON_SDHC_ISTA, MESON_SDHC_ISTA_ALL_IRQS);
 }
 
+static void meason_mx_mmc_free_host(void *data)
+{
+       mmc_free_host(data);
+}
+
 static int meson_mx_sdhc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -788,8 +793,7 @@ static int meson_mx_sdhc_probe(struct platform_device *pdev)
 	if (!mmc)
 		return -ENOMEM;
 
-	ret = devm_add_action_or_reset(dev, (void(*)(void *))mmc_free_host,
-				       mmc);
+	ret = devm_add_action_or_reset(dev, meason_mx_mmc_free_host, mmc);
 	if (ret) {
 		dev_err(dev, "Failed to register mmc_free_host action\n");
 		return ret;


WARNING: multiple messages have this Message-ID (diff)
From: Simon Horman <horms@kernel.org>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Neil Armstrong <neil.armstrong@linaro.org>,
	 Kevin Hilman <khilman@baylibre.com>,
	Jerome Brunet <jbrunet@baylibre.com>,
	 Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	 Nathan Chancellor <nathan@kernel.org>,
	 Nick Desaulniers <ndesaulniers@google.com>,
	Tom Rix <trix@redhat.com>,
	 linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	 linux-amlogic@lists.infradead.org, llvm@lists.linux.dev,
	 Simon Horman <horms@kernel.org>
Subject: [PATCH] mmc: meson-mx-sdhc: Avoid cast to incompatible function type
Date: Wed, 10 May 2023 14:39:00 +0200	[thread overview]
Message-ID: <20230510-mmc-sdhci-msm-function-cast-v1-1-5ae634b24fbd@kernel.org> (raw)

Rather than casting mmc_free_host to an incompatible function type,
provide a trivial wrapper with the correct signature for the use-case.

Reported by clang-16 with W=1:

 .../meson-mx-sdhc-mmc.c:791:38: error: cast from 'void (*)(struct mmc_host *)' to 'void (*)(void *)' converts to incompatible function type [-Werror,-Wcast-function-type-strict]
         ret = devm_add_action_or_reset(dev, (void(*)(void *))mmc_free_host,
                                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 ./include/linux/device.h:265:38: note: expanded from macro 'devm_add_action_or_reset'
         __devm_add_action_or_reset(release, action, data, #action)
                                            ^~~~~~

The same approach is taken in litex_mmc.c with the function
litex_mmc_free_host_wrapper(). There may be scope for consolidation.

No functional change intended.
Compile tested only.

Signed-off-by: Simon Horman <horms@kernel.org>
---
 drivers/mmc/host/meson-mx-sdhc-mmc.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/meson-mx-sdhc-mmc.c b/drivers/mmc/host/meson-mx-sdhc-mmc.c
index da85c2f2acb8..97168cdfa8e9 100644
--- a/drivers/mmc/host/meson-mx-sdhc-mmc.c
+++ b/drivers/mmc/host/meson-mx-sdhc-mmc.c
@@ -776,6 +776,11 @@ static void meson_mx_sdhc_init_hw(struct mmc_host *mmc)
 	regmap_write(host->regmap, MESON_SDHC_ISTA, MESON_SDHC_ISTA_ALL_IRQS);
 }
 
+static void meason_mx_mmc_free_host(void *data)
+{
+       mmc_free_host(data);
+}
+
 static int meson_mx_sdhc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -788,8 +793,7 @@ static int meson_mx_sdhc_probe(struct platform_device *pdev)
 	if (!mmc)
 		return -ENOMEM;
 
-	ret = devm_add_action_or_reset(dev, (void(*)(void *))mmc_free_host,
-				       mmc);
+	ret = devm_add_action_or_reset(dev, meason_mx_mmc_free_host, mmc);
 	if (ret) {
 		dev_err(dev, "Failed to register mmc_free_host action\n");
 		return ret;


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             reply	other threads:[~2023-05-10 12:39 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-10 12:39 Simon Horman [this message]
2023-05-10 12:39 ` [PATCH] mmc: meson-mx-sdhc: Avoid cast to incompatible function type Simon Horman
2023-05-10 12:54 ` Neil Armstrong
2023-05-10 12:54   ` Neil Armstrong
2023-05-10 20:20 ` Martin Blumenstingl
2023-05-10 20:20   ` Martin Blumenstingl
2023-05-24 13:10 ` Ulf Hansson
2023-05-24 13:10   ` Ulf Hansson
2023-05-24 13:10   ` Ulf Hansson

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