Date: Thu, 11 May 2023 10:29:32 +0800 (CST)
From: "Yun Lu" <luyun_611@....com>
To: "Bitterblue Smith" <rtl8821cerfe2@...il.com>, 
	"Larry Finger" <Larry.Finger@...inger.net>
Cc: Jes.Sorensen@...il.com, kvalo@...nel.org, davem@...emloft.net, 
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, 
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] wifi: rtl8xxxu: fix authentication timeout due to
 incorrect RCR value

Larry  and  Bitterblue:

Thank you for your reply,  are there any further questions or suggestions on this issue?
Could this patch be merged? There seems to be no other side effects.



在 2023-05-04 15:39:57，"Yun Lu" <luyun_611@....com> 写道：
>
>在 2023-04-30 18:36:50，"Bitterblue Smith" <rtl8821cerfe2@...il.com> 写道：
>>On 29/04/2023 06:35, Yun Lu wrote:
>>> At 2023-04-29 01:06:03, "Larry Finger" <Larry.Finger@...inger.net> wrote:
>>>> On 4/27/23 23:11, wo wrote:
>>>>> [  149.595642] [pid:7,cpu6,kworker/u16:0,0]BEFORE: REG_RCR differs from regrcr: 
>>>>> 0x1830613 insted of 0x7000604e
>>>>> [  160.676422] [pid:237,cpu6,kworker/u16:5,3]BEFORE: REG_RCR differs from 
>>>>> regrcr: 0x70006009 insted of 0x700060ce
>>>>> [  327.234588] [pid:7,cpu7,kworker/u16:0,5]BEFORE: REG_RCR differs from 
>>>> regrcr: 0x1830d33 insted of 0x7000604e
>>>>
>>>>
>>>> My patch was messed up, but it got the information that I wanted, which is shown 
>>>> in the quoted lines above. One of these differs only in the low-order byte, 
>>>> while the other 2 are completely different. Strange!
>>>>
>>>> It is possible that there is a firmware error. My system, which does not show 
>>>> the problem, reports the following:
>>>>
>>>> [54130.741148] usb 3-6: RTL8192CU rev A (TSMC) romver 0, 2T2R, TX queues 2, 
>>>> WiFi=1, BT=0, GPS=0, HI PA=0
>>>> [54130.741153] usb 3-6: RTL8192CU MAC: xx:xx:xx:xx:xx:xx
>>>> [54130.741155] usb 3-6: rtl8xxxu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
>>>> [54130.742301] usb 3-6: Firmware revision 88.2 (signature 0x88c1)
>>>>
>>>> Which firmware does your unit use?
>>> 
>>> The firmware verion we used is 80.0 (signature 0x88c1)
>>>  [  903.873107] [pid:14,cpu0,kworker/0:1,2]usb 1-1.2: RTL8192CU rev A (TSMC) 2T2R, TX queues 2, WiFi=1, BT=0, GPS=0, HI PA=0
>>> [  903.873138] [pid:14,cpu0,kworker/0:1,3]usb 1-1.2: RTL8192CU MAC: 08:be:xx:xx:xx:xx
>>> [  903.873138] [pid:14,cpu0,kworker/0:1,4]usb 1-1.2: rtl8xxxu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
>>> [  903.873474] [pid:14,cpu0,kworker/0:1,5]usb 1-1.2: Firmware revision 80.0 (signature 0x88c1)
>>> 
>>>>
>>>> Attached is a new test patch. When it logs a CORRUPTED value, I would like to 
>>>> know what task is attached to the pid listed in the message. Note that the two 
>>>> instances where the entire word was wrong came from pid:7.
>>>>
>>>> Could improper locking could produce these results?
>>>>
>>>> Larry
>>> 
>>> Apply your new patch, then turn on/off the wireless network switch on the network control panel serverl loops.
>>> The log shows:
>>> [   85.384429] [pid:221,cpu6,kworker/u16:6,5]REG_RCR corrupted in rtl8xxxu_configure_filter: 0x70006009 insted of 0x700060ce
>>> [  121.681976] [pid:216,cpu6,kworker/u16:3,0]REG_RCR corrupted in rtl8xxxu_configure_filter: 0x70006009 insted of 0x700060ce
>>> [  144.416992] [pid:217,cpu6,kworker/u16:4,1]REG_RCR corrupted in rtl8xxxu_configure_filter: 0x70006009 insted of 0x700060ce
>>> 
>>> And if we up/down the interface serverl loops as follows:
>>> ifconfig wlx08bexxxxxx down
>>> sleep 1
>>> ifconfig wlx08bexxxxxx up
>>> sleep 10
>>> The log shows:
>>> [  282.112335] [2023:04:29 10:30:34][pid:95,cpu6,kworker/u16:1,3]REG_RCR corrupted in rtl8xxxu_configure_filter: 0x1832e13 insted of 0x7000604e
>>> [  293.311462] [2023:04:29 10:30:45][pid:217,cpu7,kworker/u16:4,9]REG_RCR corrupted in rtl8xxxu_configure_filter: 0x1830e72 insted of 0x7000604e
>>> [  304.435089] [2023:04:29 10:30:56][pid:217,cpu6,kworker/u16:4,9]REG_RCR corrupted in rtl8xxxu_configure_filter: 0x1830ed3 insted of 0x7000604e
>>> [  315.532257] [2023:04:29 10:31:07][pid:95,cpu7,kworker/u16:1,8]REG_RCR corrupted in rtl8xxxu_configure_filter: 0x7000604e insted of 0x7000604e
>>> [  324.114379] [2023:04:29 10:31:16][pid:221,cpu6,kworker/u16:6,7]REG_RCR corrupted in rtl8xxxu_configure_filter: 0x1832e14 insted of 0x7000604e
>>> 
>>> We also update the  firmware verion to 88.2, and the test results are the same as above.
>>> 
>>> Thank you for helping debug this issue, which seems to be related to specific devices.
>>> 
>>> Yun Lu
>>> 
>>> 
>>> 
>>> 
>>There was this bug report about phantom MAC addresses with
>>the RTL8188CUS:
>>https://lore.kernel.org/linux-wireless/a31d9500-73a3-f890-bebd-d0a4014f87da@reto-schneider.ch/
>>
>>See the pcap file. I wonder if it's related?
>
>The bug in the link is a high retransmission rate during message transmission, but the problem we encountered is that
>the nic cannot receive authentication frames, resulting in authentication timeout and inability to connect to WiFi. It seems
>that these two issues are not related.
>
>We also enabled monitor mode and found that the AP has replied to the authentication message, but the nic cannot receive
>this reply message due to the incorrect RCR register value. Once the RCR register is modified to the correct value,
>the authentication message can be received normally and the connection to WIFI can be normal.
>
>Thanks.
>
>
>

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