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Date: Sat, 9 Mar 2013 19:16:44 +0100
From: Lars-Peter Clausen <lars@...afoo.de>
To: Wolfram Sang <wsa@...-dreams.de>, Ben Dooks <ben-linux@...ff.org>
Cc: linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
Lars-Peter Clausen <lars@...afoo.de>
Subject: [PATCH 1/6] i2c: Remove detach_adapter
The detach_adapter callback has been deprecated for quite some time and has no
user left. Keeping it alive blocks other cleanups, so remove it.
Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>
---
drivers/i2c/i2c-core.c | 33 ++++++++++-----------------------
include/linux/i2c.h | 7 ++-----
2 files changed, 12 insertions(+), 28 deletions(-)
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index f7dfe87..a853cb3 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -47,7 +47,7 @@
/* core_lock protects i2c_adapter_idr, and guarantees
that device detection, deletion of detected devices, and attach_adapter
- and detach_adapter calls are serialized */
+ calls are serialized */
static DEFINE_MUTEX(core_lock);
static DEFINE_IDR(i2c_adapter_idr);
@@ -1013,11 +1013,10 @@ int i2c_add_numbered_adapter(struct i2c_adapter *adap)
}
EXPORT_SYMBOL_GPL(i2c_add_numbered_adapter);
-static int i2c_do_del_adapter(struct i2c_driver *driver,
+static void i2c_do_del_adapter(struct i2c_driver *driver,
struct i2c_adapter *adapter)
{
struct i2c_client *client, *_n;
- int res;
/* Remove the devices we created ourselves as the result of hardware
* probing (using a driver's detect method) */
@@ -1029,16 +1028,6 @@ static int i2c_do_del_adapter(struct i2c_driver *driver,
i2c_unregister_device(client);
}
}
-
- if (!driver->detach_adapter)
- return 0;
- dev_warn(&adapter->dev, "%s: detach_adapter method is deprecated\n",
- driver->driver.name);
- res = driver->detach_adapter(adapter);
- if (res)
- dev_err(&adapter->dev, "detach_adapter failed (%d) "
- "for driver [%s]\n", res, driver->driver.name);
- return res;
}
static int __unregister_client(struct device *dev, void *dummy)
@@ -1059,7 +1048,8 @@ static int __unregister_dummy(struct device *dev, void *dummy)
static int __process_removed_adapter(struct device_driver *d, void *data)
{
- return i2c_do_del_adapter(to_i2c_driver(d), data);
+ i2c_do_del_adapter(to_i2c_driver(d), data);
+ return 0;
}
/**
@@ -1072,7 +1062,6 @@ static int __process_removed_adapter(struct device_driver *d, void *data)
*/
int i2c_del_adapter(struct i2c_adapter *adap)
{
- int res = 0;
struct i2c_adapter *found;
struct i2c_client *client, *next;
@@ -1088,11 +1077,9 @@ int i2c_del_adapter(struct i2c_adapter *adap)
/* Tell drivers about this removal */
mutex_lock(&core_lock);
- res = bus_for_each_drv(&i2c_bus_type, NULL, adap,
+ bus_for_each_drv(&i2c_bus_type, NULL, adap,
__process_removed_adapter);
mutex_unlock(&core_lock);
- if (res)
- return res;
/* Remove devices instantiated from sysfs */
mutex_lock_nested(&adap->userspace_clients_lock,
@@ -1111,8 +1098,8 @@ int i2c_del_adapter(struct i2c_adapter *adap)
* we can't remove the dummy devices during the first pass: they
* could have been instantiated by real devices wishing to clean
* them up properly, so we give them a chance to do that first. */
- res = device_for_each_child(&adap->dev, NULL, __unregister_client);
- res = device_for_each_child(&adap->dev, NULL, __unregister_dummy);
+ device_for_each_child(&adap->dev, NULL, __unregister_client);
+ device_for_each_child(&adap->dev, NULL, __unregister_dummy);
#ifdef CONFIG_I2C_COMPAT
class_compat_remove_link(i2c_adapter_compat_class, &adap->dev,
@@ -1208,9 +1195,9 @@ EXPORT_SYMBOL(i2c_register_driver);
static int __process_removed_driver(struct device *dev, void *data)
{
- if (dev->type != &i2c_adapter_type)
- return 0;
- return i2c_do_del_adapter(data, to_i2c_adapter(dev));
+ if (dev->type == &i2c_adapter_type)
+ i2c_do_del_adapter(data, to_i2c_adapter(dev));
+ return 0;
}
/**
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index d0c4db7..8ffab3f 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -125,7 +125,6 @@ extern s32 i2c_smbus_write_i2c_block_data(const struct i2c_client *client,
* struct i2c_driver - represent an I2C device driver
* @class: What kind of i2c device we instantiate (for detect)
* @attach_adapter: Callback for bus addition (deprecated)
- * @detach_adapter: Callback for bus removal (deprecated)
* @probe: Callback for device binding
* @remove: Callback for device unbinding
* @shutdown: Callback for device shutdown
@@ -162,12 +161,10 @@ extern s32 i2c_smbus_write_i2c_block_data(const struct i2c_client *client,
struct i2c_driver {
unsigned int class;
- /* Notifies the driver that a new bus has appeared or is about to be
- * removed. You should avoid using this, it will be removed in a
- * near future.
+ /* Notifies the driver that a new bus has appeared. You should avoid
+ * using this, it will be removed in a near future.
*/
int (*attach_adapter)(struct i2c_adapter *) __deprecated;
- int (*detach_adapter)(struct i2c_adapter *) __deprecated;
/* Standard driver model interfaces */
int (*probe)(struct i2c_client *, const struct i2c_device_id *);
--
1.8.0
--
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