i2c: remove i2c_lock_adapter and use i2c_lock_bus directly

The i2c_lock_adapter name is ambiguous since it is unclear if it
refers to the root adapter or the adapter you name in the argument.
The natural interpretation is the adapter you name in the argument,
but there are historical reasons for that not being the case; it
in fact locks the root adapter. Just remove the function and force
users to spell out the I2C_LOCK_ROOT_ADAPTER name to indicate what
is really going on. Also remove i2c_unlock_adapter, of course.

This patch was generated with

git grep -l 'i2c_\(un\)\?lock_adapter' \
| xargs sed -i 's/i2c_\(un\)\?lock_adapter(\([^)]*\))/'\
'i2c_\1lock_bus(\2, I2C_LOCK_ROOT_ADAPTER)/g'

followed by white-space touch-up.

Signed-off-by: Peter Rosin <peda@axentia.se>
Acked-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-brcmstb.c

@@ -689,9 +689,9 @@ static int brcmstb_i2c_suspend(struct device *dev)
 {
 	struct brcmstb_i2c_dev *i2c_dev = dev_get_drvdata(dev);
 
-	i2c_lock_adapter(&i2c_dev->adapter);
+	i2c_lock_bus(&i2c_dev->adapter, I2C_LOCK_ROOT_ADAPTER);
 	i2c_dev->is_suspended = true;
-	i2c_unlock_adapter(&i2c_dev->adapter);
+	i2c_unlock_bus(&i2c_dev->adapter, I2C_LOCK_ROOT_ADAPTER);
 
 	return 0;
 }
@@ -700,10 +700,10 @@ static int brcmstb_i2c_resume(struct device *dev)
 {
 	struct brcmstb_i2c_dev *i2c_dev = dev_get_drvdata(dev);
 
-	i2c_lock_adapter(&i2c_dev->adapter);
+	i2c_lock_bus(&i2c_dev->adapter, I2C_LOCK_ROOT_ADAPTER);
 	brcmstb_i2c_set_bsc_reg_defaults(i2c_dev);
 	i2c_dev->is_suspended = false;
-	i2c_unlock_adapter(&i2c_dev->adapter);
+	i2c_unlock_bus(&i2c_dev->adapter, I2C_LOCK_ROOT_ADAPTER);
 
 	return 0;
 }

drivers/i2c/busses/i2c-davinci.c

@@ -714,14 +714,14 @@ static int i2c_davinci_cpufreq_transition(struct notifier_block *nb,
 
 	dev = container_of(nb, struct davinci_i2c_dev, freq_transition);
 
-	i2c_lock_adapter(&dev->adapter);
+	i2c_lock_bus(&dev->adapter, I2C_LOCK_ROOT_ADAPTER);
 	if (val == CPUFREQ_PRECHANGE) {
 		davinci_i2c_reset_ctrl(dev, 0);
 	} else if (val == CPUFREQ_POSTCHANGE) {
 		i2c_davinci_calc_clk_dividers(dev);
 		davinci_i2c_reset_ctrl(dev, 1);
 	}
-	i2c_unlock_adapter(&dev->adapter);
+	i2c_unlock_bus(&dev->adapter, I2C_LOCK_ROOT_ADAPTER);
 
 	return 0;
 }

drivers/i2c/busses/i2c-gpio.c

@@ -78,24 +78,24 @@ static struct dentry *i2c_gpio_debug_dir;
 #define getscl(bd)	((bd)->getscl((bd)->data))
 
 #define WIRE_ATTRIBUTE(wire) \
-static int fops_##wire##_get(void *data, u64 *val)	\
-{							\
-	struct i2c_gpio_private_data *priv = data;	\
-							\
-	i2c_lock_adapter(&priv->adap);			\
-	*val = get##wire(&priv->bit_data);		\
-	i2c_unlock_adapter(&priv->adap);		\
-	return 0;					\
-}							\
-static int fops_##wire##_set(void *data, u64 val)	\
-{							\
-	struct i2c_gpio_private_data *priv = data;	\
-							\
-	i2c_lock_adapter(&priv->adap);			\
-	set##wire(&priv->bit_data, val);		\
-	i2c_unlock_adapter(&priv->adap);		\
-	return 0;					\
-}							\
+static int fops_##wire##_get(void *data, u64 *val)		\
+{								\
+	struct i2c_gpio_private_data *priv = data;		\
+								\
+	i2c_lock_bus(&priv->adap, I2C_LOCK_ROOT_ADAPTER);	\
+	*val = get##wire(&priv->bit_data);			\
+	i2c_unlock_bus(&priv->adap, I2C_LOCK_ROOT_ADAPTER);	\
+	return 0;						\
+}								\
+static int fops_##wire##_set(void *data, u64 val)		\
+{								\
+	struct i2c_gpio_private_data *priv = data;		\
+								\
+	i2c_lock_bus(&priv->adap, I2C_LOCK_ROOT_ADAPTER);	\
+	set##wire(&priv->bit_data, val);			\
+	i2c_unlock_bus(&priv->adap, I2C_LOCK_ROOT_ADAPTER);	\
+	return 0;						\
+}								\
 DEFINE_DEBUGFS_ATTRIBUTE(fops_##wire, fops_##wire##_get, fops_##wire##_set, "%llu\n")
 
 WIRE_ATTRIBUTE(scl);
@@ -113,7 +113,7 @@ static int fops_incomplete_transfer_set(void *data, u64 addr)
 	/* ADDR (7 bit) + RD (1 bit) + SDA hi (1 bit) */
 	pattern = (addr << 2) | 3;
 
-	i2c_lock_adapter(&priv->adap);
+	i2c_lock_bus(&priv->adap, I2C_LOCK_ROOT_ADAPTER);
 
 	/* START condition */
 	setsda(bit_data, 0);
@@ -129,7 +129,7 @@ static int fops_incomplete_transfer_set(void *data, u64 addr)
 		udelay(bit_data->udelay);
 	}
 
-	i2c_unlock_adapter(&priv->adap);
+	i2c_unlock_bus(&priv->adap, I2C_LOCK_ROOT_ADAPTER);
 
 	return 0;
 }

drivers/i2c/busses/i2c-s3c2410.c

@@ -919,9 +919,9 @@ static int s3c24xx_i2c_cpufreq_transition(struct notifier_block *nb,
 
 	if ((val == CPUFREQ_POSTCHANGE && delta_f < 0) ||
 	    (val == CPUFREQ_PRECHANGE && delta_f > 0)) {
-		i2c_lock_adapter(&i2c->adap);
+		i2c_lock_bus(&i2c->adap, I2C_LOCK_ROOT_ADAPTER);
 		ret = s3c24xx_i2c_clockrate(i2c, &got);
-		i2c_unlock_adapter(&i2c->adap);
+		i2c_unlock_bus(&i2c->adap, I2C_LOCK_ROOT_ADAPTER);
 
 		if (ret < 0)
 			dev_err(i2c->dev, "cannot find frequency (%d)\n", ret);

drivers/i2c/busses/i2c-sprd.c

@@ -590,9 +590,9 @@ static int __maybe_unused sprd_i2c_suspend_noirq(struct device *pdev)
 {
 	struct sprd_i2c *i2c_dev = dev_get_drvdata(pdev);
 
-	i2c_lock_adapter(&i2c_dev->adap);
+	i2c_lock_bus(&i2c_dev->adap, I2C_LOCK_ROOT_ADAPTER);
 	i2c_dev->is_suspended = true;
-	i2c_unlock_adapter(&i2c_dev->adap);
+	i2c_unlock_bus(&i2c_dev->adap, I2C_LOCK_ROOT_ADAPTER);
 
 	return pm_runtime_force_suspend(pdev);
 }
@@ -601,9 +601,9 @@ static int __maybe_unused sprd_i2c_resume_noirq(struct device *pdev)
 {
 	struct sprd_i2c *i2c_dev = dev_get_drvdata(pdev);
 
-	i2c_lock_adapter(&i2c_dev->adap);
+	i2c_lock_bus(&i2c_dev->adap, I2C_LOCK_ROOT_ADAPTER);
 	i2c_dev->is_suspended = false;
-	i2c_unlock_adapter(&i2c_dev->adap);
+	i2c_unlock_bus(&i2c_dev->adap, I2C_LOCK_ROOT_ADAPTER);
 
 	return pm_runtime_force_resume(pdev);
 }

drivers/i2c/i2c-core-slave.c

@@ -47,9 +47,9 @@ int i2c_slave_register(struct i2c_client *client, i2c_slave_cb_t slave_cb)
 
 	client->slave_cb = slave_cb;
 
-	i2c_lock_adapter(client->adapter);
+	i2c_lock_bus(client->adapter, I2C_LOCK_ROOT_ADAPTER);
 	ret = client->adapter->algo->reg_slave(client);
-	i2c_unlock_adapter(client->adapter);
+	i2c_unlock_bus(client->adapter, I2C_LOCK_ROOT_ADAPTER);
 
 	if (ret) {
 		client->slave_cb = NULL;
@@ -69,9 +69,9 @@ int i2c_slave_unregister(struct i2c_client *client)
 		return -EOPNOTSUPP;
 	}
 
-	i2c_lock_adapter(client->adapter);
+	i2c_lock_bus(client->adapter, I2C_LOCK_ROOT_ADAPTER);
 	ret = client->adapter->algo->unreg_slave(client);
-	i2c_unlock_adapter(client->adapter);
+	i2c_unlock_bus(client->adapter, I2C_LOCK_ROOT_ADAPTER);
 
 	if (ret == 0)
 		client->slave_cb = NULL;

drivers/iio/temperature/mlx90614.c

@@ -433,11 +433,11 @@ static int mlx90614_wakeup(struct mlx90614_data *data)
 
 	dev_dbg(&data->client->dev, "Requesting wake-up");
 
-	i2c_lock_adapter(data->client->adapter);
+	i2c_lock_bus(data->client->adapter, I2C_LOCK_ROOT_ADAPTER);
 	gpiod_direction_output(data->wakeup_gpio, 0);
 	msleep(MLX90614_TIMING_WAKEUP);
 	gpiod_direction_input(data->wakeup_gpio);
-	i2c_unlock_adapter(data->client->adapter);
+	i2c_unlock_bus(data->client->adapter, I2C_LOCK_ROOT_ADAPTER);
 
 	data->ready_timestamp = jiffies +
 			msecs_to_jiffies(MLX90614_TIMING_STARTUP);

include/linux/i2c.h

@@ -754,18 +754,6 @@ i2c_unlock_bus(struct i2c_adapter *adapter, unsigned int flags)
 	adapter->lock_ops->unlock_bus(adapter, flags);
 }
 
-static inline void
-i2c_lock_adapter(struct i2c_adapter *adapter)
-{
-	i2c_lock_bus(adapter, I2C_LOCK_ROOT_ADAPTER);
-}
-
-static inline void
-i2c_unlock_adapter(struct i2c_adapter *adapter)
-{
-	i2c_unlock_bus(adapter, I2C_LOCK_ROOT_ADAPTER);
-}
-
 /*flags for the client struct: */
 #define I2C_CLIENT_PEC		0x04	/* Use Packet Error Checking */
 #define I2C_CLIENT_TEN		0x10	/* we have a ten bit chip address */