linux-kernel - [PATCH 1/5] ACPI: battery: Do not unload battery hooks on single error

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Date:   Mon, 12 Sep 2022 14:53:38 +0200
From:   Armin Wolf <W_Armin@....de>
To:     hdegoede@...hat.com, markgross@...nel.org
Cc:     rafael@...nel.org, lenb@...nel.org, hmh@....eng.br,
        matan@...alib.org, corentin.chary@...il.com, jeremy@...tem76.com,
        productdev@...tem76.com, platform-driver-x86@...r.kernel.org,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] ACPI: battery: Do not unload battery hooks on single error

Currently, battery hooks are being unloaded if they return
an error when adding a single battery.
This however also causes the removal of successfully added
hooks if they return -ENODEV for a single unsupported
battery.

Do not unload battery hooks in such cases since the hook
handles any cleanup actions.

Signed-off-by: Armin Wolf <W_Armin@....de>
---
 drivers/acpi/battery.c | 24 +++---------------------
 1 file changed, 3 insertions(+), 21 deletions(-)

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 306513fec1e1..e59c261c7c59 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -724,20 +724,10 @@ void battery_hook_register(struct acpi_battery_hook *hook)
 	 * its attributes.
 	 */
 	list_for_each_entry(battery, &acpi_battery_list, list) {
-		if (hook->add_battery(battery->bat)) {
-			/*
-			 * If a add-battery returns non-zero,
-			 * the registration of the extension has failed,
-			 * and we will not add it to the list of loaded
-			 * hooks.
-			 */
-			pr_err("extension failed to load: %s", hook->name);
-			__battery_hook_unregister(hook, 0);
-			goto end;
-		}
+		hook->add_battery(battery->bat);
 	}
 	pr_info("new extension: %s\n", hook->name);
-end:
+
 	mutex_unlock(&hook_mutex);
 }
 EXPORT_SYMBOL_GPL(battery_hook_register);
@@ -762,15 +752,7 @@ static void battery_hook_add_battery(struct acpi_battery *battery)
 	 * during the battery module initialization.
 	 */
 	list_for_each_entry_safe(hook_node, tmp, &battery_hook_list, list) {
-		if (hook_node->add_battery(battery->bat)) {
-			/*
-			 * The notification of the extensions has failed, to
-			 * prevent further errors we will unload the extension.
-			 */
-			pr_err("error in extension, unloading: %s",
-					hook_node->name);
-			__battery_hook_unregister(hook_node, 0);
-		}
+		hook_node->add_battery(battery->bat);
 	}
 	mutex_unlock(&hook_mutex);
 }
--
2.30.2