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author | Armin Wolf <W_Armin@gmx.de> | 2024-10-01 23:28:33 +0200 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2024-10-02 20:14:50 +0200 |
commit | 86309cbed26139e1caae7629dcca1027d9a28e75 (patch) | |
tree | fbbdef8646483ed3387f9eaca3ba1b9660c97e7b /drivers/acpi | |
parent | 9852d85ec9d492ebef56dc5f229416c925758edc (diff) | |
download | linux-stable-86309cbed26139e1caae7629dcca1027d9a28e75.tar.gz linux-stable-86309cbed26139e1caae7629dcca1027d9a28e75.tar.bz2 linux-stable-86309cbed26139e1caae7629dcca1027d9a28e75.zip |
ACPI: battery: Simplify battery hook locking
Move the conditional locking from __battery_hook_unregister()
into battery_hook_unregister() and rename the low-level function
to simplify the locking during battery hook removal.
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://patch.msgid.link/20241001212835.341788-2-W_Armin@gmx.de
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r-- | drivers/acpi/battery.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index f4599261cfc3..dda59ee5a11e 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -703,28 +703,28 @@ static LIST_HEAD(acpi_battery_list); static LIST_HEAD(battery_hook_list); static DEFINE_MUTEX(hook_mutex); -static void __battery_hook_unregister(struct acpi_battery_hook *hook, int lock) +static void battery_hook_unregister_unlocked(struct acpi_battery_hook *hook) { struct acpi_battery *battery; + /* * In order to remove a hook, we first need to * de-register all the batteries that are registered. */ - if (lock) - mutex_lock(&hook_mutex); list_for_each_entry(battery, &acpi_battery_list, list) { if (!hook->remove_battery(battery->bat, hook)) power_supply_changed(battery->bat); } list_del(&hook->list); - if (lock) - mutex_unlock(&hook_mutex); + pr_info("extension unregistered: %s\n", hook->name); } void battery_hook_unregister(struct acpi_battery_hook *hook) { - __battery_hook_unregister(hook, 1); + mutex_lock(&hook_mutex); + battery_hook_unregister_unlocked(hook); + mutex_unlock(&hook_mutex); } EXPORT_SYMBOL_GPL(battery_hook_unregister); @@ -750,7 +750,7 @@ void battery_hook_register(struct acpi_battery_hook *hook) * hooks. */ pr_err("extension failed to load: %s", hook->name); - __battery_hook_unregister(hook, 0); + battery_hook_unregister_unlocked(hook); goto end; } @@ -804,7 +804,7 @@ static void battery_hook_add_battery(struct acpi_battery *battery) */ pr_err("error in extension, unloading: %s", hook_node->name); - __battery_hook_unregister(hook_node, 0); + battery_hook_unregister_unlocked(hook_node); } } mutex_unlock(&hook_mutex); @@ -837,7 +837,7 @@ static void __exit battery_hook_exit(void) * need to remove the hooks. */ list_for_each_entry_safe(hook, ptr, &battery_hook_list, list) { - __battery_hook_unregister(hook, 1); + battery_hook_unregister(hook); } mutex_destroy(&hook_mutex); } |