linux-kernel - Re: [PATCH] rtlwifi: Fix non-working BSS STA mode

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Message-Id: <816E584A-2695-4ACC-98E1-BAC7A7A585D4@canonical.com>
Date:   Thu, 13 Dec 2018 16:03:06 +0800
From:   Kai Heng Feng <kai.heng.feng@...onical.com>
To:     Pkshih <pkshih@...ltek.com>
Cc:     "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "kvalo@...eaurora.org" <kvalo@...eaurora.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] rtlwifi: Fix non-working BSS STA mode



> On Dec 13, 2018, at 15:39, Pkshih <pkshih@...ltek.com> wrote:
> 
> On Thu, 2018-12-13 at 13:36 +0800, Kai Heng Feng wrote:
>>> On Dec 13, 2018, at 08:35, Pkshih <pkshih@...ltek.com> wrote:
>>>  
>>> On Wed, 2018-12-12 at 13:13 +0800, Kai-Heng Feng wrote:
>>>> Once BSS STA mode gets started, it can be scanned by other clients but
>>>> cannot entablish a connection.
>>>           ^^^ typo: establish
>>>>  
>>>> Turns out the set_bcn_reg() and its *_set_beacon_related_registers()
>>>> callbacks never get called so it has problem beaconing.
>>>>  
>>>> Enable the function in rtl_op_bss_info_changed() can make BSS STA mode
>>>> start to work.
>>>>  
>>>> Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
>>>> ---
>>>>   drivers/net/wireless/realtek/rtlwifi/core.c | 2 +-
>>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>>  
>>>> diff --git a/drivers/net/wireless/realtek/rtlwifi/core.c
>>>> b/drivers/net/wireless/realtek/rtlwifi/core.c
>>>> index 4bf7967590ca..11d27a5cc576 100644
>>>> --- a/drivers/net/wireless/realtek/rtlwifi/core.c
>>>> +++ b/drivers/net/wireless/realtek/rtlwifi/core.c
>>>> @@ -1054,7 +1054,7 @@ static void rtl_op_bss_info_changed(struct
>> ieee80211_hw
>>>> *hw,
>>>>   					 "BSS_CHANGED_BEACON_ENABLED\n");
>>>>   
>>>>   				/*start hw beacon interrupt. */
>>>> -				/*rtlpriv->cfg->ops->set_bcn_reg(hw); */
>>>> +				rtlpriv->cfg->ops->set_bcn_reg(hw);
>>>>   				mac->beacon_enabled = 1;
>>>>   				rtlpriv->cfg->ops-
>>> update_interrupt_mask(hw,
>>>>   						rtlpriv->cfg->maps
>>>  
>>> Which wifi chip do you use? And, please share your test scenario.
>> 
>> It’s Realtek 8723DE, which is currently not supported in mainline so I use
>> rtl8723de in rtlwifi_new [1] to test it out.
>> 
>> The test scenario is simply enable hotspot through network manager, which uses
>> wpa_supplicant to do the work.
>> 
>> [1] https://github.com/lwfinger/rtlwifi_new
>> 
> 
> Since rtl8723de isn't supported yet, this patch would be pending.
> I'll take time to check whether it works on existing chips.

Thanks, that will be great.

Unrelated question:
Is it possible to use a DMI table to select correct ant_sel for affected HP laptops?
This can bring better out-of-the-box experience for users.

Kai-Heng

> 
> Thanks
> PK