From: Yang Yingliang yangyingliang@huawei.com
[ Upstream commit 1b6599f741a4525ca761ecde46e5885ff1e6ba58 ]
In the error path after calling dev_set_name(), the device name is leaked. To fix this, calling dev_set_name() before device_register(), and call put_device() if it returns error.
All the resources is released in powercap_release(), so it can return from powercap_register_zone() directly.
Fixes: 75d2364ea0ca ("PowerCap: Add class driver") Signed-off-by: Yang Yingliang yangyingliang@huawei.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/powercap/powercap_sys.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/powercap/powercap_sys.c b/drivers/powercap/powercap_sys.c index 1f968353d4799..e180dee0f83d0 100644 --- a/drivers/powercap/powercap_sys.c +++ b/drivers/powercap/powercap_sys.c @@ -530,9 +530,6 @@ struct powercap_zone *powercap_register_zone( power_zone->name = kstrdup(name, GFP_KERNEL); if (!power_zone->name) goto err_name_alloc; - dev_set_name(&power_zone->dev, "%s:%x", - dev_name(power_zone->dev.parent), - power_zone->id); power_zone->constraints = kcalloc(nr_constraints, sizeof(*power_zone->constraints), GFP_KERNEL); @@ -555,9 +552,16 @@ struct powercap_zone *powercap_register_zone( power_zone->dev_attr_groups[0] = &power_zone->dev_zone_attr_group; power_zone->dev_attr_groups[1] = NULL; power_zone->dev.groups = power_zone->dev_attr_groups; + dev_set_name(&power_zone->dev, "%s:%x", + dev_name(power_zone->dev.parent), + power_zone->id); result = device_register(&power_zone->dev); - if (result) - goto err_dev_ret; + if (result) { + put_device(&power_zone->dev); + mutex_unlock(&control_type->lock); + + return ERR_PTR(result); + }
control_type->nr_zones++; mutex_unlock(&control_type->lock);