i2c: convert to idr_alloc()
Convert to the much saner new idr interface.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Wolfram Sang <wolfram@the-dreams.de>
Tested-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 66a30f7..8d1f644 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -935,25 +935,17 @@
*/
int i2c_add_adapter(struct i2c_adapter *adapter)
{
- int id, res = 0;
-
-retry:
- if (idr_pre_get(&i2c_adapter_idr, GFP_KERNEL) == 0)
- return -ENOMEM;
+ int id;
mutex_lock(&core_lock);
- /* "above" here means "above or equal to", sigh */
- res = idr_get_new_above(&i2c_adapter_idr, adapter,
- __i2c_first_dynamic_bus_num, &id);
+ id = idr_alloc(&i2c_adapter_idr, adapter,
+ __i2c_first_dynamic_bus_num, 0, GFP_KERNEL);
mutex_unlock(&core_lock);
-
- if (res < 0) {
- if (res == -EAGAIN)
- goto retry;
- return res;
- }
+ if (id < 0)
+ return id;
adapter->nr = id;
+
return i2c_register_adapter(adapter);
}
EXPORT_SYMBOL(i2c_add_adapter);
@@ -984,33 +976,19 @@
int i2c_add_numbered_adapter(struct i2c_adapter *adap)
{
int id;
- int status;
if (adap->nr == -1) /* -1 means dynamically assign bus id */
return i2c_add_adapter(adap);
if (adap->nr & ~MAX_IDR_MASK)
return -EINVAL;
-retry:
- if (idr_pre_get(&i2c_adapter_idr, GFP_KERNEL) == 0)
- return -ENOMEM;
-
mutex_lock(&core_lock);
- /* "above" here means "above or equal to", sigh;
- * we need the "equal to" result to force the result
- */
- status = idr_get_new_above(&i2c_adapter_idr, adap, adap->nr, &id);
- if (status == 0 && id != adap->nr) {
- status = -EBUSY;
- idr_remove(&i2c_adapter_idr, id);
- }
+ id = idr_alloc(&i2c_adapter_idr, adap, adap->nr, adap->nr + 1,
+ GFP_KERNEL);
mutex_unlock(&core_lock);
- if (status == -EAGAIN)
- goto retry;
-
- if (status == 0)
- status = i2c_register_adapter(adap);
- return status;
+ if (id < 0)
+ return id == -ENOSPC ? -EBUSY : id;
+ return i2c_register_adapter(adap);
}
EXPORT_SYMBOL_GPL(i2c_add_numbered_adapter);