linux-kernel - [PATCH] power: supply: apm_power: only unset own apm_get_power

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Message-ID: <xczpgox57hxbunkcbdl5fxhc4gnsajsipldfidi7355afezk64@tarta.nabijaczleweli.xyz>
Date: Fri, 17 Oct 2025 00:05:18 +0200
From: 
	Ahelenia Ziemiańska <nabijaczleweli@...ijaczleweli.xyz>
To: Sebastian Reichel <sre@...nel.org>, Anton Vorontsov <cbou@...l.ru>, 
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] power: supply: apm_power: only unset own apm_get_power_status

Mirroring drivers/macintosh/apm_emu.c, this means that
  modprobe apm_power && modprobe $anotherdriver && modprobe -r apm_power
leaves $anotherdriver's apm_get_power_status instead of deleting it.

Fixes: 3788ec932bfd ("[BATTERY] APM emulation driver for class batteries")
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@...ijaczleweli.xyz>
---
 drivers/power/supply/apm_power.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/power/supply/apm_power.c b/drivers/power/supply/apm_power.c
index 9236e0078578..9933cdc5c387 100644
--- a/drivers/power/supply/apm_power.c
+++ b/drivers/power/supply/apm_power.c
@@ -364,7 +364,8 @@ static int __init apm_battery_init(void)
 
 static void __exit apm_battery_exit(void)
 {
-	apm_get_power_status = NULL;
+	if (apm_get_power_status == apm_battery_apm_get_power_status)
+		apm_get_power_status = NULL;
 }
 
 module_init(apm_battery_init);
-- 
2.39.5

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