linux-kernel - [PATCH AUTOSEL 6.14 03/54] wifi: ath11k: fix memory leak in ath11k_xxx

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Message-Id: <20250403190209.2675485-3-sashal@kernel.org>
Date: Thu,  3 Apr 2025 15:01:18 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Miaoqing Pan <quic_miaoqing@...cinc.com>,
	Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>,
	Jeff Johnson <jeff.johnson@....qualcomm.com>,
	Sasha Levin <sashal@...nel.org>,
	jjohnson@...nel.org,
	ath11k@...ts.infradead.org
Subject: [PATCH AUTOSEL 6.14 03/54] wifi: ath11k: fix memory leak in ath11k_xxx_remove()

From: Miaoqing Pan <quic_miaoqing@...cinc.com>

[ Upstream commit efb24b1f0d29537714dd3cc46fb335ac27855251 ]

The firmware memory was allocated in ath11k_pci_probe() or
ath11k_ahb_probe(), but not freed in ath11k_xxx_remove() in case
ATH11K_FLAG_QMI_FAIL bit is set. So call ath11k_fw_destroy() to
free the memory.

Found while fixing the same problem in ath12k:
https://lore.kernel.org/linux-wireless/20240314012746.2729101-1-quic_miaoqing@quicinc.com

Tested-on: WCN6855 hw2.1 PCI WLAN.HSP.1.1-04546-QCAHSPSWPL_V1_V2_SILICONZ_IOE-1

Signed-off-by: Miaoqing Pan <quic_miaoqing@...cinc.com>
Reviewed-by: Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>
Link: https://patch.msgid.link/20250123084948.1124357-1-quic_miaoqing@quicinc.com
Signed-off-by: Jeff Johnson <jeff.johnson@....qualcomm.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/ath/ath11k/ahb.c  | 4 +++-
 drivers/net/wireless/ath/ath11k/core.c | 3 +--
 drivers/net/wireless/ath/ath11k/fw.c   | 3 ++-
 drivers/net/wireless/ath/ath11k/pci.c  | 3 ++-
 4 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/ahb.c b/drivers/net/wireless/ath/ath11k/ahb.c
index f2fc04596d481..eedba3766ba24 100644
--- a/drivers/net/wireless/ath/ath11k/ahb.c
+++ b/drivers/net/wireless/ath/ath11k/ahb.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: BSD-3-Clause-Clear
 /*
  * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
- * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2022-2025 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <linux/module.h>
@@ -1290,6 +1290,7 @@ static void ath11k_ahb_remove(struct platform_device *pdev)
 	ath11k_core_deinit(ab);
 
 qmi_fail:
+	ath11k_fw_destroy(ab);
 	ath11k_ahb_free_resources(ab);
 }
 
@@ -1309,6 +1310,7 @@ static void ath11k_ahb_shutdown(struct platform_device *pdev)
 	ath11k_core_deinit(ab);
 
 free_resources:
+	ath11k_fw_destroy(ab);
 	ath11k_ahb_free_resources(ab);
 }
 
diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c
index c576bbba52bf1..85077247b0251 100644
--- a/drivers/net/wireless/ath/ath11k/core.c
+++ b/drivers/net/wireless/ath/ath11k/core.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: BSD-3-Clause-Clear
 /*
  * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
- * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2025 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <linux/module.h>
@@ -2346,7 +2346,6 @@ void ath11k_core_deinit(struct ath11k_base *ab)
 	ath11k_hif_power_down(ab);
 	ath11k_mac_destroy(ab);
 	ath11k_core_soc_destroy(ab);
-	ath11k_fw_destroy(ab);
 }
 EXPORT_SYMBOL(ath11k_core_deinit);
 
diff --git a/drivers/net/wireless/ath/ath11k/fw.c b/drivers/net/wireless/ath/ath11k/fw.c
index 4e36292a79db8..cbbd8e57119f2 100644
--- a/drivers/net/wireless/ath/ath11k/fw.c
+++ b/drivers/net/wireless/ath/ath11k/fw.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: BSD-3-Clause-Clear
 /*
- * Copyright (c) 2022-2023, Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2022-2025 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include "core.h"
@@ -166,3 +166,4 @@ void ath11k_fw_destroy(struct ath11k_base *ab)
 {
 	release_firmware(ab->fw.fw);
 }
+EXPORT_SYMBOL(ath11k_fw_destroy);
diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index b93f04973ad79..f1121e3317194 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: BSD-3-Clause-Clear
 /*
  * Copyright (c) 2019-2020 The Linux Foundation. All rights reserved.
- * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2025 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <linux/module.h>
@@ -984,6 +984,7 @@ static void ath11k_pci_remove(struct pci_dev *pdev)
 	ath11k_core_deinit(ab);
 
 qmi_fail:
+	ath11k_fw_destroy(ab);
 	ath11k_mhi_unregister(ab_pci);
 
 	ath11k_pcic_free_irq(ab);
-- 
2.39.5