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[PATCH] i2c: make better use of IDR in i2c-core

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This patch uses the already existing IDR mechanism to simplify and
improve the i2c_get_adapter function in i2c-core.

Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Mark M. Hoffman 2005-06-28 00:21:30 -04:00 committed by Greg Kroah-Hartman
parent 5da69ba42a
commit a0920e1043
1 changed files with 6 additions and 11 deletions
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17
drivers/i2c/i2c-core.c
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@ -156,7 +156,7 @@ int i2c_add_adapter(struct i2c_adapter *adap)
goto out_unlock;
}
res = idr_get_new(&i2c_adapter_idr, NULL, &id);
res = idr_get_new(&i2c_adapter_idr, adap, &id);
if (res < 0) {
if (res == -EAGAIN)
res = -ENOMEM;
@ -765,20 +765,15 @@ int i2c_adapter_id(struct i2c_adapter *adap)
struct i2c_adapter* i2c_get_adapter(int id)
{
struct list_head *item;
struct i2c_adapter *adapter;
down(&core_lists);
list_for_each(item,&adapters) {
adapter = list_entry(item, struct i2c_adapter, list);
if (id == adapter->nr &&
try_module_get(adapter->owner)) {
up(&core_lists);
return adapter;
}
}
adapter = (struct i2c_adapter *)idr_find(&i2c_adapter_idr, id);
if (adapter && !try_module_get(adapter->owner))
adapter = NULL;
up(&core_lists);
return NULL;
return adapter;
}
void i2c_put_adapter(struct i2c_adapter *adap)