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[PATCH] I2C: Convert i2c to mutexes

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The patch below converts a few i2c semaphores to mutexes

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Arjan van de Ven
2006-01-11 10:50:26 +01:00
committed by Greg Kroah-Hartman
parent 2488a39d23
commit b3585e4f5b
4 changed files with 28 additions and 24 deletions
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23
drivers/i2c/i2c-core.c
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@@ -31,12 +31,13 @@
#include <linux/idr.h>
#include <linux/seq_file.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
static LIST_HEAD(adapters);
static LIST_HEAD(drivers);
static DECLARE_MUTEX(core_lists);
static DEFINE_MUTEX(core_lists);
static DEFINE_IDR(i2c_adapter_idr);
/* match always succeeds, as we want the probe() to tell if we really accept this match */
@@ -153,7 +154,7 @@ int i2c_add_adapter(struct i2c_adapter *adap)
struct list_head *item;
struct i2c_driver *driver;
down(&core_lists);
mutex_lock(&core_lists);
if (idr_pre_get(&i2c_adapter_idr, GFP_KERNEL) == 0) {
res = -ENOMEM;
@@ -203,7 +204,7 @@ int i2c_add_adapter(struct i2c_adapter *adap)
}
out_unlock:
up(&core_lists);
mutex_unlock(&core_lists);
return res;
}
@@ -216,7 +217,7 @@ int i2c_del_adapter(struct i2c_adapter *adap)
struct i2c_client *client;
int res = 0;
down(&core_lists);
mutex_lock(&core_lists);
/* First make sure that this adapter was ever added */
list_for_each_entry(adap_from_list, &adapters, list) {
@@ -272,7 +273,7 @@ int i2c_del_adapter(struct i2c_adapter *adap)
dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name);
out_unlock:
up(&core_lists);
mutex_unlock(&core_lists);
return res;
}
@@ -289,7 +290,7 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
struct i2c_adapter *adapter;
int res = 0;
down(&core_lists);
mutex_lock(&core_lists);
/* add the driver to the list of i2c drivers in the driver core */
driver->driver.owner = owner;
@@ -311,7 +312,7 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
}
out_unlock:
up(&core_lists);
mutex_unlock(&core_lists);
return res;
}
EXPORT_SYMBOL(i2c_register_driver);
@@ -324,7 +325,7 @@ int i2c_del_driver(struct i2c_driver *driver)
int res = 0;
down(&core_lists);
mutex_lock(&core_lists);
/* Have a look at each adapter, if clients of this driver are still
* attached. If so, detach them to be able to kill the driver
@@ -363,7 +364,7 @@ int i2c_del_driver(struct i2c_driver *driver)
pr_debug("i2c-core: driver [%s] unregistered\n", driver->driver.name);
out_unlock:
up(&core_lists);
mutex_unlock(&core_lists);
return 0;
}
@@ -779,12 +780,12 @@ struct i2c_adapter* i2c_get_adapter(int id)
{
struct i2c_adapter *adapter;
down(&core_lists);
mutex_lock(&core_lists);
adapter = (struct i2c_adapter *)idr_find(&i2c_adapter_idr, id);
if (adapter && !try_module_get(adapter->owner))
adapter = NULL;
up(&core_lists);
mutex_unlock(&core_lists);
return adapter;
}