linux-kernel - [PATCH v5 04/24] i2c: designware: Fix lock probe call order in dw_i2c_plat

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Date:   Thu,  7 Dec 2023 16:13:44 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Mario Limonciello <mario.limonciello@....com>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Wolfram Sang <wsa@...nel.org>,
        Andi Shyti <andi.shyti@...nel.org>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Jan Dabros <jsd@...ihalf.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Serge Semin <fancer.lancer@...il.com>
Subject: [PATCH v5 04/24] i2c: designware: Fix lock probe call order in dw_i2c_plat_probe()

We should not mix managed calls with non-managed. This will break
the calls order at the error path and ->remove() stages. Fix this
by wrapping lock probe to become managed one.

Fixes: 78d5e9e299e3 ("i2c: designware: Add AMD PSP I2C bus support")
Reviewed-by: Andi Shyti <andi.shyti@...nel.org>
Tested-by: Serge Semin <fancer.lancer@...il.com>
Acked-by: Jarkko Nikula <jarkko.nikula@...ux.intel.com>
Link: https://lore.kernel.org/r/20231120144641.1660574-5-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/i2c/busses/i2c-designware-platdrv.c | 24 ++++++++++-----------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 648fb84e574d..63cc3cdca2c7 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -243,6 +243,17 @@ static const struct i2c_dw_semaphore_callbacks i2c_dw_semaphore_cb_table[] = {
 	{}
 };
 
+static void i2c_dw_remove_lock_support(void *data)
+{
+	struct dw_i2c_dev *dev = data;
+
+	if (dev->semaphore_idx < 0)
+		return;
+
+	if (i2c_dw_semaphore_cb_table[dev->semaphore_idx].remove)
+		i2c_dw_semaphore_cb_table[dev->semaphore_idx].remove(dev);
+}
+
 static int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev)
 {
 	const struct i2c_dw_semaphore_callbacks *ptr;
@@ -273,16 +284,7 @@ static int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev)
 		break;
 	}
 
-	return 0;
-}
-
-static void i2c_dw_remove_lock_support(struct dw_i2c_dev *dev)
-{
-	if (dev->semaphore_idx < 0)
-		return;
-
-	if (i2c_dw_semaphore_cb_table[dev->semaphore_idx].remove)
-		i2c_dw_semaphore_cb_table[dev->semaphore_idx].remove(dev);
+	return devm_add_action_or_reset(dev->dev, i2c_dw_remove_lock_support, dev);
 }
 
 static void dw_i2c_plat_assert_reset(void *data)
@@ -428,8 +430,6 @@ static void dw_i2c_plat_remove(struct platform_device *pdev)
 
 	pm_runtime_dont_use_autosuspend(&pdev->dev);
 	pm_runtime_put_sync(&pdev->dev);
-
-	i2c_dw_remove_lock_support(dev);
 }
 
 static int dw_i2c_plat_prepare(struct device *dev)
-- 
2.43.0.rc1.1.gbec44491f096