linux-kernel - Re: [PATCH] ath10k: skip ath10k_halt during suspend for driver state RESTARTING

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Date:   Mon, 25 Apr 2022 16:11:44 -0700
From:   Brian Norris <briannorris@...omium.org>
To:     Abhishek Kumar <kuabhs@...omium.org>
Cc:     kvalo@...nel.org, linux-kernel@...r.kernel.org,
        linux-wireless@...r.kernel.org, ath10k@...ts.infradead.org,
        netdev@...r.kernel.org, Wen Gong <quic_wgong@...cinc.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH] ath10k: skip ath10k_halt during suspend for driver state
 RESTARTING

On Mon, Apr 25, 2022 at 02:15:20AM +0000, Abhishek Kumar wrote:
> --- a/drivers/net/wireless/ath/ath10k/mac.c
> +++ b/drivers/net/wireless/ath/ath10k/mac.c
> @@ -5345,8 +5345,22 @@ static void ath10k_stop(struct ieee80211_hw *hw)
>  
>  	mutex_lock(&ar->conf_mutex);
>  	if (ar->state != ATH10K_STATE_OFF) {
> -		if (!ar->hw_rfkill_on)
> -			ath10k_halt(ar);
> +		if (!ar->hw_rfkill_on) {
> +			/* If the current driver state is RESTARTING but not yet
> +			 * fully RESTARTED because of incoming suspend event,
> +			 * then ath11k_halt is already called via

s/ath11k/ath10k/

I know ath11k is the hot new thing, but this is ath10k ;)

> +			 * ath10k_core_restart and should not be called here.

s/ath10k/ath11k/

> +			 */
> +			if (ar->state != ATH10K_STATE_RESTARTING)
> +				ath10k_halt(ar);
> +			else
> +				/* Suspending here, because when in RESTARTING
> +				 * state, ath11k_core_stop skips

s/ath10k/ath11k/

> +				 * ath10k_wait_for_suspend.
> +				 */
> +				ath10k_wait_for_suspend(ar,
> +							WMI_PDEV_SUSPEND_AND_DISABLE_INTR);
> +		}
>  		ar->state = ATH10K_STATE_OFF;
>  	}
>  	mutex_unlock(&ar->conf_mutex);

Otherwise, I believe this is the right solution to the problem pointed
out in the commit message:

Reviewed-by: Brian Norris <briannorris@...omium.org>