linux-kernel - Re: [PATCH] ath10k: add cleanup in ath10k_sta

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Message-ID: <20191113192821.GA3441686@builder>
Date:   Wed, 13 Nov 2019 11:28:21 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Wenwen Wang <wenwen@...uga.edu>, Kalle Valo <kvalo@...eaurora.org>
Cc:     "David S. Miller" <davem@...emloft.net>,
        "open list:QUALCOMM ATHEROS ATH10K WIRELESS DRIVER" 
        <ath10k@...ts.infradead.org>,
        "open list:NETWORKING DRIVERS (WIRELESS)" 
        <linux-wireless@...r.kernel.org>,
        "open list:NETWORKING DRIVERS" <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        jeffrey.l.hugo@...il.com, govinds@...eaurora.org
Subject: Re: [PATCH] ath10k: add cleanup in ath10k_sta_state()

On Thu 15 Aug 14:04 PDT 2019, Wenwen Wang wrote:

> If 'sta->tdls' is false, no cleanup is executed, leading to memory/resource
> leaks, e.g., 'arsta->tx_stats'. To fix this issue, perform cleanup before
> go to the 'exit' label.
> 

Unfortunately this patch consistently crashes all my msm8998, sdm845 and
qcs404 devices (running ath10k_snoc).  Upon trying to join a network the
WiFi firmware crashes with the following:

[  124.315286] wlan0: authenticate with 70:3a:cb:4d:34:f3
[  124.334051] wlan0: send auth to 70:3a:cb:4d:34:f3 (try 1/3)
[  124.338828] wlan0: authenticated
[  124.342470] wlan0: associate with 70:3a:cb:4d:34:f3 (try 1/3)
[  124.347223] wlan0: RX AssocResp from 70:3a:cb:4d:34:f3 (capab=0x1011 status=0 aid=2)
[  124.402535] qcom-q6v5-mss 4080000.remoteproc: fatal error received: err_qdi.c:456:EF:wlan_process:1:cmnos_thread.c:3900:Asserted in wlan_vdev.c:_wlan_vdev_up:3219

Can we please revert it for v5.5?

Regards,
Bjorn

> Signed-off-by: Wenwen Wang <wenwen@...uga.edu>
> ---
>  drivers/net/wireless/ath/ath10k/mac.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
> index 0606416..f99e6d2 100644
> --- a/drivers/net/wireless/ath/ath10k/mac.c
> +++ b/drivers/net/wireless/ath/ath10k/mac.c
> @@ -6548,8 +6548,12 @@ static int ath10k_sta_state(struct ieee80211_hw *hw,
>  
>  		spin_unlock_bh(&ar->data_lock);
>  
> -		if (!sta->tdls)
> +		if (!sta->tdls) {
> +			ath10k_peer_delete(ar, arvif->vdev_id, sta->addr);
> +			ath10k_mac_dec_num_stations(arvif, sta);
> +			kfree(arsta->tx_stats);
>  			goto exit;
> +		}
>  
>  		ret = ath10k_wmi_update_fw_tdls_state(ar, arvif->vdev_id,
>  						      WMI_TDLS_ENABLE_ACTIVE);
> -- 
> 2.7.4
>