[PATCH ath-current v2 3/3] wifi: ath11k: unregister PM notifier on QMI init failure path

[Miaoqing Pan <miaoqing.pan@oss.qualcomm.com>]

ath11k_core_init() registers a PM notifier before the QMI server
becomes available. If the QMI server never arrives, the device remove()
path can take the early-exit path introduced for QMI initialization
failures, skipping ath11k_core_deinit().

As a result, the PM notifier remains registered after the ath11k base
object has been freed. A subsequent suspend or resume event may invoke
the stale notifier and trigger a use-after-free.

Fix this by explicitly unregistering the PM notifier in the QMI failure
cleanup path before releasing ath11k resources.

Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.2.0.c2-00204-QCAMSLSWPLZ-1

Fixes: 32d93b51bc7e ("wifi: ath11k: choose default PM policy for hibernation")
Signed-off-by: Miaoqing Pan <miaoqing.pan@oss.qualcomm.com>
---
 drivers/net/wireless/ath/ath11k/ahb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/ath/ath11k/ahb.c b/drivers/net/wireless/ath/ath11k/ahb.c
index c3ce5ea36e3c..ee3f493d2e44 100644
--- a/drivers/net/wireless/ath/ath11k/ahb.c
+++ b/drivers/net/wireless/ath/ath11k/ahb.c
@@ -1302,6 +1302,7 @@ static void ath11k_ahb_remove(struct platform_device *pdev)
 		ath11k_ahb_power_down(ab, false);
 		ath11k_debugfs_soc_destroy(ab);
 		ath11k_qmi_deinit_service(ab);
+		ath11k_core_pm_notifier_unregister(ab);
 		goto qmi_fail;
 	}
 
-- 
2.34.1