[PATCH 6.0 0747/1073] power: supply: cw2015: Use device managed API to simplify the code

Greg Kroah-Hartman
2022-12-28T16:24:06Z

From: Zheyu Ma <zheyuma97@gmail.com>

[ Upstream commit 0cb172a4918e0b180400c3e1b2894641703eab6d ]

Use devm_delayed_work_autocancel() instead of the INIT_DELAYED_WORK() to
remove the cw_bat_remove() function.

And power_supply_put_battery_info() can also be removed because the
power_supply_get_battery_info() uses device managed memory allocation.

Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Stable-dep-of: 97f2b4ddb0aa ("power: supply: cw2015: Fix potential null-ptr-deref in cw_bat_probe()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/power/supply/cw2015_battery.c | 14 +++-----------
1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/power/supply/cw2015_battery.c b/drivers/power/supply/cw2015_battery.c
index 728e2a6cc9c3..6d52641151d9 100644
--- a/drivers/power/supply/cw2015_battery.c
+++ b/drivers/power/supply/cw2015_battery.c
@@ -21,6 +21,7 @@
#include <linux/regmap.h>
#include <linux/time.h>
#include <linux/workqueue.h>
+#include <linux/devm-helpers.h>

#define CW2015_SIZE_BATINFO 64

@@ -698,7 +699,8 @@ static int cw_bat_probe(struct i2c_client *client)
}

cw_bat->battery_workqueue = create_singlethread_workqueue("rk_battery");
- INIT_DELAYED_WORK(&cw_bat->battery_delay_work, cw_bat_work);
+ devm_delayed_work_autocancel(&client->dev,
+ &cw_bat->battery_delay_work, cw_bat_work);
queue_delayed_work(cw_bat->battery_workqueue,
&cw_bat->battery_delay_work, msecs_to_jiffies(10));
return 0;
@@ -725,15 +727,6 @@ static int __maybe_unused cw_bat_resume(struct device *dev)

static SIMPLE_DEV_PM_OPS(cw_bat_pm_ops, cw_bat_suspend, cw_bat_resume);

-static int cw_bat_remove(struct i2c_client *client)
-{
- struct cw_battery *cw_bat = i2c_get_clientdata(client);
-
- cancel_delayed_work_sync(&cw_bat->battery_delay_work);
- power_supply_put_battery_info(cw_bat->rk_bat, cw_bat->battery);
- return 0;
-}
-
static const struct i2c_device_id cw_bat_id_table[] = {
{ "cw2015", 0 },
{ }
@@ -752,7 +745,6 @@ static struct i2c_driver cw_bat_driver = {
.pm = &cw_bat_pm_ops,
},
.probe_new = cw_bat_probe,
- .remove = cw_bat_remove,
.id_table = cw_bat_id_table,
};

--
2.35.1