From 6aafa1c2d3e3fea2ebe84c018003f2a91722e607 Mon Sep 17 00:00:00 2001 From: P Praneesh Date: Tue, 6 Jun 2023 14:41:28 +0530 Subject: [PATCH] wifi: ath11k: fix memory leak in WMI firmware stats Memory allocated for firmware pdev, vdev and beacon statistics are not released during rmmod. Fix it by calling ath11k_fw_stats_free() function before hardware unregister. While at it, avoid calling ath11k_fw_stats_free() while processing the firmware stats received in the WMI event because the local list is getting spliced and reinitialised and hence there are no elements in the list after splicing. Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1 Signed-off-by: P Praneesh Signed-off-by: Aditya Kumar Singh Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20230606091128.14202-1-quic_adisi@quicinc.com --- drivers/net/wireless/ath/ath11k/mac.c | 1 + drivers/net/wireless/ath/ath11k/wmi.c | 5 +++++ 2 files changed, 6 insertions(+) --- a/drivers/net/wireless/ath/ath11k/mac.c +++ b/drivers/net/wireless/ath/ath11k/mac.c @@ -9792,6 +9792,7 @@ void ath11k_mac_destroy(struct ath11k_ba if (!ar) continue; + ath11k_fw_stats_free(&ar->fw_stats); ieee80211_free_hw(ar->hw); pdev->ar = NULL; } --- a/drivers/net/wireless/ath/ath11k/wmi.c +++ b/drivers/net/wireless/ath/ath11k/wmi.c @@ -8119,6 +8119,11 @@ complete: rcu_read_unlock(); spin_unlock_bh(&ar->data_lock); + /* Since the stats's pdev, vdev and beacon list are spliced and reinitialised + * at this point, no need to free the individual list. + */ + return; + free: ath11k_fw_stats_free(&stats); }