linux-kernel - [PATCH v5 06/24] i2c: designware: Save pointer to semaphore callbacks instead of index

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Date:   Thu,  7 Dec 2023 16:13:46 +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 06/24] i2c: designware: Save pointer to semaphore callbacks instead of index

Instead of saving index and do an additional level of referencing,
save just a pointer to the semaphore callbacks directly. It makes
code cleaner.

Acked-by: Jarkko Nikula <jarkko.nikula@...ux.intel.com>
Reviewed-by: Andi Shyti <andi.shyti@...nel.org>
Tested-by: Serge Semin <fancer.lancer@...il.com>
Link: https://lore.kernel.org/r/20231120144641.1660574-7-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/i2c/busses/i2c-designware-core.h    |  4 +++-
 drivers/i2c/busses/i2c-designware-platdrv.c | 12 ++++--------
 2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index a7f6f3eafad7..f8dd87cb0ae9 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -187,6 +187,8 @@ struct clk;
 struct device;
 struct reset_control;
 
+struct i2c_dw_semaphore_callbacks;
+
 /**
  * struct dw_i2c_dev - private i2c-designware data
  * @dev: driver model device node
@@ -291,7 +293,7 @@ struct dw_i2c_dev {
 	u16			hs_lcnt;
 	int			(*acquire_lock)(void);
 	void			(*release_lock)(void);
-	int			semaphore_idx;
+	const struct i2c_dw_semaphore_callbacks *semaphore_cb;
 	bool			shared_with_punit;
 	void			(*disable)(struct dw_i2c_dev *dev);
 	int			(*init)(struct dw_i2c_dev *dev);
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index cb954f11540e..4b5e58e1ce5b 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -247,21 +247,18 @@ static void i2c_dw_remove_lock_support(void *data)
 {
 	struct dw_i2c_dev *dev = data;
 
-	if (dev->semaphore_idx < 0)
+	if (!dev->semaphore_cb)
 		return;
 
-	if (i2c_dw_semaphore_cb_table[dev->semaphore_idx].remove)
-		i2c_dw_semaphore_cb_table[dev->semaphore_idx].remove(dev);
+	if (dev->semaphore_cb->remove)
+		dev->semaphore_cb->remove(dev);
 }
 
 static int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev)
 {
 	const struct i2c_dw_semaphore_callbacks *ptr;
-	int i = 0;
 	int ret;
 
-	dev->semaphore_idx = -1;
-
 	for (ptr = i2c_dw_semaphore_cb_table; ptr->probe; ptr++) {
 		ret = ptr->probe(dev);
 		if (ret) {
@@ -273,11 +270,10 @@ static int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev)
 			if (ret != -ENODEV)
 				return ret;
 
-			i++;
 			continue;
 		}
 
-		dev->semaphore_idx = i;
+		dev->semaphore_cb = ptr;
 		break;
 	}
 
-- 
2.43.0.rc1.1.gbec44491f096