From 9f4ecacf2fa47b8aadd9bca2e88cde01856de028 Mon Sep 17 00:00:00 2001
From: Aditya Kumar Singh <quic_adisi@quicinc.com>
Date: Mon, 10 Jan 2022 16:24:14 +0200
Subject: [PATCH] ath11k: fix workqueue not getting destroyed after rmmod
Git-commit: 9f4ecacf2fa47b8aadd9bca2e88cde01856de028
Patch-mainline: v5.18-rc1
References: bsc#1206451

Currently, ath11k_core_alloc() creates a single thread workqueue.
This workqueue is not detroyed during clean up when ath11k modules
are unloaded from the kernel and is left as it is.
If workqueue is not destroyed, it could lead to kernel
memory scarcity in a longer run. This could affect self and
other drivers workability as well.

Add destroy workqueue in ath11k_core_free().

Tested on: IPQ8074 WLAN.HK.2.4.0.1-01746-QCAHKSWPL_SILICONZ-1

Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/1640231787-17408-1-git-send-email-quic_adisi@quicinc.com
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/wireless/ath/ath11k/core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c
index 293563b3f784..1ad77bd721b9 100644
--- a/drivers/net/wireless/ath/ath11k/core.c
+++ b/drivers/net/wireless/ath/ath11k/core.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: BSD-3-Clause-Clear
 /*
  * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2021 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <linux/module.h>
@@ -1404,6 +1405,9 @@ EXPORT_SYMBOL(ath11k_core_deinit);
 
 void ath11k_core_free(struct ath11k_base *ab)
 {
+	flush_workqueue(ab->workqueue);
+	destroy_workqueue(ab->workqueue);
+
 	kfree(ab);
 }
 EXPORT_SYMBOL(ath11k_core_free);
-- 
2.35.3