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[PATCH] i2c: Rework client usage count, 2 of 3

Browse source 
Make I2C_CLIENT_ALLOW_USE the default for all i2c clients. It doesn't
hurt if the usage count is actually never used for any given driver,
and allows for nice code simplifications in i2c-core.

Signed-off-by: Jean Delvare <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Jean Delvare 2005-11-26 21:00:54 +01:00 • committed by Greg Kroah-Hartman
commit cde7859bda
29 changed files with 10 additions and 46 deletions
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1
drivers/i2c/chips/rtc8564.c
View file

@ -155,7 +155,6 @@ static int rtc8564_attach(struct i2c_adapter *adap, int addr, int kind)
strlcpy(new_client->name, "RTC8564", I2C_NAME_SIZE);
i2c_set_clientdata(new_client, d);
new_client->flags = I2C_CLIENT_ALLOW_USE;
new_client->addr = addr;
new_client->adapter = adap;
new_client->driver = &rtc8564_driver;

28
drivers/i2c/i2c-core.c
View file

@ -419,8 +419,7 @@ int i2c_attach_client(struct i2c_client *client)
}
}
if (client->flags & I2C_CLIENT_ALLOW_USE)
client->usage_count = 0;
client->usage_count = 0;
client->dev.parent = &client->adapter->dev;
client->dev.driver = &client->driver->driver;
@ -443,8 +442,7 @@ int i2c_detach_client(struct i2c_client *client)
struct i2c_adapter *adapter = client->adapter;
int res = 0;
if ((client->flags & I2C_CLIENT_ALLOW_USE)
&& (client->usage_count > 0)) {
if (client->usage_count > 0) {
dev_warn(&client->dev, "Client [%s] still busy, "
"can't detach\n", client->name);
return -EBUSY;
@ -499,12 +497,9 @@ int i2c_use_client(struct i2c_client *client)
if (ret)
return ret;
if (client->flags & I2C_CLIENT_ALLOW_USE) {
if (client->usage_count > 0)
goto busy;
else
client->usage_count++;
}
if (client->usage_count > 0)
goto busy;
client->usage_count++;
return 0;
busy:
@ -514,16 +509,13 @@ int i2c_use_client(struct i2c_client *client)
int i2c_release_client(struct i2c_client *client)
{
if(client->flags & I2C_CLIENT_ALLOW_USE) {
if(client->usage_count>0)
client->usage_count--;
else {
pr_debug("i2c-core: %s used one too many times\n",
__FUNCTION__);
return -EPERM;
}
if (!client->usage_count) {
pr_debug("i2c-core: %s used one too many times\n",
__FUNCTION__);
return -EPERM;
}
client->usage_count--;
i2c_dec_use_client(client);
return 0;