linux-kernel - [PATCH 40/62] power: convert to idr

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Date:	Sat,  2 Feb 2013 17:20:41 -0800
From:	Tejun Heo <tj@...nel.org>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, rusty@...tcorp.com.au,
	bfields@...ldses.org, skinsbursky@...allels.com,
	ebiederm@...ssion.com, jmorris@...ei.org, axboe@...nel.dk,
	Tejun Heo <tj@...nel.org>, Anton Vorontsov <cbou@...l.ru>,
	David Woodhouse <dwmw2@...radead.org>
Subject: [PATCH 40/62] power: convert to idr_alloc()

Convert to the much saner new idr interface.

Only compile tested.

Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Anton Vorontsov <cbou@...l.ru>
Cc: David Woodhouse <dwmw2@...radead.org>
---
This patch depends on an earlier idr changes and I think it would be
best to route these together through -mm.  Please holler if there's
any objection.  Thanks.

 drivers/power/bq2415x_charger.c | 11 +++--------
 drivers/power/bq27x00_battery.c |  9 +++------
 drivers/power/ds2782_battery.c  |  9 ++-------
 3 files changed, 8 insertions(+), 21 deletions(-)

diff --git a/drivers/power/bq2415x_charger.c b/drivers/power/bq2415x_charger.c
index ee842b3..65baf4e 100644
--- a/drivers/power/bq2415x_charger.c
+++ b/drivers/power/bq2415x_charger.c
@@ -1505,16 +1505,11 @@ static int bq2415x_probe(struct i2c_client *client,
 	}
 
 	/* Get new ID for the new device */
-	ret = idr_pre_get(&bq2415x_id, GFP_KERNEL);
-	if (ret == 0)
-		return -ENOMEM;
-
 	mutex_lock(&bq2415x_id_mutex);
-	ret = idr_get_new(&bq2415x_id, client, &num);
+	num = idr_alloc(&bq2415x_id, client, 0, 0, GFP_KERNEL);
 	mutex_unlock(&bq2415x_id_mutex);
-
-	if (ret < 0)
-		return ret;
+	if (num < 0)
+		return num;
 
 	name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
 	if (!name) {
diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index 36b34ef..75dd6a4 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -793,14 +793,11 @@ static int bq27x00_battery_probe(struct i2c_client *client,
 	int retval = 0;
 
 	/* Get new ID for the new battery device */
-	retval = idr_pre_get(&battery_id, GFP_KERNEL);
-	if (retval == 0)
-		return -ENOMEM;
 	mutex_lock(&battery_mutex);
-	retval = idr_get_new(&battery_id, client, &num);
+	num = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL);
 	mutex_unlock(&battery_mutex);
-	if (retval < 0)
-		return retval;
+	if (num < 0)
+		return num;
 
 	name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
 	if (!name) {
diff --git a/drivers/power/ds2782_battery.c b/drivers/power/ds2782_battery.c
index 2fa9b6b..c81f3b4 100644
--- a/drivers/power/ds2782_battery.c
+++ b/drivers/power/ds2782_battery.c
@@ -335,17 +335,12 @@ static int ds278x_battery_probe(struct i2c_client *client,
 	}
 
 	/* Get an ID for this battery */
-	ret = idr_pre_get(&battery_id, GFP_KERNEL);
-	if (ret == 0) {
-		ret = -ENOMEM;
-		goto fail_id;
-	}
-
 	mutex_lock(&battery_lock);
-	ret = idr_get_new(&battery_id, client, &num);
+	ret = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL);
 	mutex_unlock(&battery_lock);
 	if (ret < 0)
 		goto fail_id;
+	num = ret;
 
 	info = kzalloc(sizeof(*info), GFP_KERNEL);
 	if (!info) {
-- 
1.8.1

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