linux-kernel - [PATCH AUTOSEL 6.3 19/30] i2c: mchp-pci1xxxx: Avoid cast to incompatible function type

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Message-Id: <20230616102521.673087-19-sashal@kernel.org>
Date:   Fri, 16 Jun 2023 06:25:07 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Simon Horman <horms@...nel.org>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>,
        Andi Shyti <andi.shyti@...nel.org>,
        Tharun Kumar P <tharunkumar.pasumarthi@...rochip.com>,
        Wolfram Sang <wsa@...nel.org>, Sasha Levin <sashal@...nel.org>,
        kumaravel.thiagarajan@...rochip.com, UNGLinuxDriver@...rochip.com,
        nathan@...nel.org, ndesaulniers@...gle.com,
        linux-i2c@...r.kernel.org, llvm@...ts.linux.dev
Subject: [PATCH AUTOSEL 6.3 19/30] i2c: mchp-pci1xxxx: Avoid cast to incompatible function type

From: Simon Horman <horms@...nel.org>

[ Upstream commit 7ebfd881abe9e0ea9557b29dab6aa28d294fabb4 ]

Rather than casting pci1xxxx_i2c_shutdown to an incompatible function type,
update the type to match that expected by __devm_add_action.

Reported by clang-16 with W-1:

 .../i2c-mchp-pci1xxxx.c:1159:29: error: cast from 'void (*)(struct pci1xxxx_i2c *)' to 'void (*)(void *)' converts to incompatible function type [-Werror,-Wcast-function-type-strict]
         ret = devm_add_action(dev, (void (*)(void *))pci1xxxx_i2c_shutdown, i2c);
                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 ./include/linux/device.h:251:29: note: expanded from macro 'devm_add_action'
         __devm_add_action(release, action, data, #action)
                                   ^~~~~~

No functional change intended.
Compile tested only.

Signed-off-by: Simon Horman <horms@...nel.org>
Reviewed-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
Reviewed-by: Andi Shyti <andi.shyti@...nel.org>
Reviewed-by: Tharun Kumar P<tharunkumar.pasumarthi@...rochip.com>
Signed-off-by: Wolfram Sang <wsa@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/i2c/busses/i2c-mchp-pci1xxxx.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mchp-pci1xxxx.c b/drivers/i2c/busses/i2c-mchp-pci1xxxx.c
index b21ffd6df9276..5ef136c3ecb12 100644
--- a/drivers/i2c/busses/i2c-mchp-pci1xxxx.c
+++ b/drivers/i2c/busses/i2c-mchp-pci1xxxx.c
@@ -1118,8 +1118,10 @@ static int pci1xxxx_i2c_resume(struct device *dev)
 static DEFINE_SIMPLE_DEV_PM_OPS(pci1xxxx_i2c_pm_ops, pci1xxxx_i2c_suspend,
 			 pci1xxxx_i2c_resume);
 
-static void pci1xxxx_i2c_shutdown(struct pci1xxxx_i2c *i2c)
+static void pci1xxxx_i2c_shutdown(void *data)
 {
+	struct pci1xxxx_i2c *i2c = data;
+
 	pci1xxxx_i2c_config_padctrl(i2c, false);
 	pci1xxxx_i2c_configure_core_reg(i2c, false);
 }
@@ -1156,7 +1158,7 @@ static int pci1xxxx_i2c_probe_pci(struct pci_dev *pdev,
 	init_completion(&i2c->i2c_xfer_done);
 	pci1xxxx_i2c_init(i2c);
 
-	ret = devm_add_action(dev, (void (*)(void *))pci1xxxx_i2c_shutdown, i2c);
+	ret = devm_add_action(dev, pci1xxxx_i2c_shutdown, i2c);
 	if (ret)
 		return ret;
 
-- 
2.39.2