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From:   Kalle Valo <kvalo@codeaurora.org>
To:     Thomas Gleixner <tglx@linutronix.de>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        Frederic Weisbecker <frederic@kernel.org>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        "Ahmed S. Darwish" <a.darwish@linutronix.de>,
        ath9k-devel@qca.qualcomm.com,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
        Peter Zijlstra <peterz@infradead.org>,
        Denis Kirjanov <kda@linux-powerpc.org>,
        Chas Williams <3chas3@gmail.com>,
        linux-atm-general@lists.sourceforge.net,
        "K. Y. Srinivasan" <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        Wei Liu <wei.liu@kernel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Rob Herring <robh@kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>,
        linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org,
        Stefan Richter <stefanr@s5r6.in-berlin.de>,
        linux1394-devel@lists.sourceforge.net
Subject: Re: [patch 10/14] ath9k: Use tasklet_disable_in_atomic()
References: <20210309084203.995862150@linutronix.de>
        <20210309084242.313899703@linutronix.de>
Date:   Tue, 09 Mar 2021 12:23:14 +0200
In-Reply-To: <20210309084242.313899703@linutronix.de> (Thomas Gleixner's
        message of "Tue, 09 Mar 2021 09:42:13 +0100")
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Thomas Gleixner <tglx@linutronix.de> writes:

> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
>
> All callers of ath9k_beacon_ensure_primary_slot() are preemptible /
> acquire a mutex except for this callchain:
>
>   spin_lock_bh(&sc->sc_pcu_lock);
>   ath_complete_reset()
>   -> ath9k_calculate_summary_state()
>      -> ath9k_beacon_ensure_primary_slot()
>
> It's unclear how that can be distangled, so use tasklet_disable_in_atomic()
> for now. This allows tasklet_disable() to become sleepable once the
> remaining atomic users are cleaned up.
>
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> Cc: ath9k-devel@qca.qualcomm.com
> Cc: Kalle Valo <kvalo@codeaurora.org>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: linux-wireless@vger.kernel.org
> Cc: netdev@vger.kernel.org
> ---
>  drivers/net/wireless/ath/ath9k/beacon.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

I assume this goes via some other tree:

Acked-by: Kalle Valo <kvalo@codeaurora.org>

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