netdev - Re: [PATCH] ath10k: add cleanup in ath10k_sta

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Date:   Wed, 13 Nov 2019 12:37:46 -0700
From:   Jeffrey Hugo <jeffrey.l.hugo@...il.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Wenwen Wang <wenwen@...uga.edu>, Kalle Valo <kvalo@...eaurora.org>,
        "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>,
        govinds@...eaurora.org
Subject: Re: [PATCH] ath10k: add cleanup in ath10k_sta_state()

On Wed, Nov 13, 2019 at 12:28 PM Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
>
> 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?

I observe the same, and concur with this request.

>
> 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
> >