Re: [PATCH 07/16] wil6210: refactor disconnect flow

From: Kalle Valo <kvalo@codeaurora.org>
To: merez@codeaurora.org
Cc: Ahmad Masri <amasri@codeaurora.org>,
	linux-wireless@vger.kernel.org, wil6210@qti.qualcomm.com,
	linux-wireless-owner@vger.kernel.org
Subject: Re: [PATCH 07/16] wil6210: refactor disconnect flow
Date: Tue, 06 Nov 2018 14:40:46 +0200	[thread overview]
Message-ID: <87va5acrap.fsf@codeaurora.org> (raw)
In-Reply-To: <98ff59749bbf386ba92faec2203ac3e9@codeaurora.org> (merez@codeaurora.org's message of "Tue, 06 Nov 2018 14:38:22 +0200")

merez@codeaurora.org writes:

> On 2018-11-06 14:28, Kalle Valo wrote:
>> merez@codeaurora.org writes:
>>
>>> On 2018-11-06 12:30, Kalle Valo wrote:
>>>> Maya Erez <merez@codeaurora.org> writes:
>>>>
>>>>> From: Ahmad Masri <amasri@codeaurora.org>
>>>>>
>>>>> Separate sending command to the fw from the event handling
>>>>> function to
>>>>> simplify the disconnect flow and track the from_event flag
>>>>> correctly.
>>>>>
>>>>> Signed-off-by: Ahmad Masri <amasri@codeaurora.org>
>>>>> Signed-off-by: Maya Erez <merez@codeaurora.org>
>>>>
>>>> [...]
>>>>
>>>>> +static int wil_disconnect_cid(struct wil6210_vif *vif, int cid,
>>>>> +			      u16 reason_code)
>>>>> +__acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
>>>>> +{
>>>>> +	struct wil6210_priv *wil = vif_to_wil(vif);
>>>>> +	struct wireless_dev *wdev = vif_to_wdev(vif);
>>>>> +	struct wil_sta_info *sta = &wil->sta[cid];
>>>>> +	bool del_sta = false;
>>>>> +
>>>>> +	might_sleep();
>>>>> +	wil_dbg_misc(wil, "disconnect_cid: CID %d, MID %d, status %d\n",
>>>>> +		     cid, sta->mid, sta->status);
>>>>> +
>>>>> +	if (sta->status == wil_sta_unused)
>>>>> +		return 0;
>>>>> +
>>>>> +	if (vif->mid != sta->mid) {
>>>>> +		wil_err(wil, "STA MID mismatch with VIF MID(%d)\n", vif->mid);
>>>>> +		return -EINVAL;
>>>>> +	}
>>>>> +
>>>>> +	/* inform lower layers */
>>>>> +	if (wdev->iftype == NL80211_IFTYPE_AP && disable_ap_sme)
>>>>> +		del_sta = true;
>>>>> +
>>>>> +	/* disconnect by sending command disconnect/del_sta and wait
>>>>> +	 * synchronously for WMI_DISCONNECT_EVENTID event.
>>>>> +	 */
>>>>> +	return wmi_disconnect_sta(vif, sta->addr, reason_code, del_sta);
>>>>> +}
>>>>
>>>> I don't get use of __acquires() and __releases() in this function. I
>>>> see
>>>> similar pattern already in wil6210 but care to explain why this is
>>>> needed? I don't see the function even accessing tid_rx_lock so I'm
>>>> very
>>>> confused.
>>>
>>> I assume it is a copy / paste leftover that we missed in the code
>>> review. We will remove it.
>>
>> Actually I already removed the annotations from the pending branch and
>> no need to resend, it's faster that way. Please double check if you
>> can,
>> unfortunately I cannot provide a direct link cgit doesn't show the new
>> commit yet.
>
> In such a case you can go ahead and apply the patches without
> "wil6210: ignore HALP ICR if already handled". I'll upstream its fixed
> version
> in the next set of wil6210 patches.

Ok, I dropped "wil6210: ignore HALP ICR if already handled" and I'm
planning to apply the rest.

-- 
Kalle Valo