linux-kernel - Re: [BUG] staging: rtl8192e: W_DISABLE# does not work after stop/start

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Message-ID: <5f2275ce-c62d-9363-32ad-58b25848119c@gmail.com>
Date:   Fri, 14 Apr 2023 00:17:26 +0200
From:   Philipp Hortmann <philipp.g.hortmann@...il.com>
To:     Dan Carpenter <error27@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [BUG] staging: rtl8192e: W_DISABLE# does not work after
 stop/start

On 4/13/23 11:34, Dan Carpenter wrote:
> On Fri, Apr 07, 2023 at 11:02:05PM +0200, Philipp Hortmann wrote:
>> When loading the driver for rtl8192e, the W_DISABLE# switch is working as
>> intended. But when the WLAN is turned off in software and then turned on
>> again the W_DISABLE# does not work anymore.
>>
>> Reason for this is that in the function _rtl92e_dm_check_rf_ctrl_gpio()
>> checking this every two seconds is an conditional return.
>>
>> 	if (priv->bfirst_after_down) {
>> 		priv->bfirst_after_down = true; // PH: useless line
>> 		return;
>> 	}
>>
>> 	tmp1byte = rtl92e_readb(dev, GPI); // PH: GPI for W_DISABLE#
>>
>> bfirst_after_down is set true when switching the WLAN off in software. But
>> it is not set to false again when WLAN is turned on again.
>>
> 
> Is there a question here?  You're like the expert on this driver and you
> seem to have figured out the solution...  I'm confused.
For me a bug report is always a please to the community to fix. But when 
nobody likes to start I have to do it by myself...
> 
> regards,
> dan carpenter
> 

As expected I am not even on the half way. I can set the 
bfirst_after_down back to false. Then WLAN recovers but not the 
connection. The os is asking me to enter the WLAN password. I can do so 
but that does not fix the issue. I need to switch WLAN off and on in 
software. Then the connection comes back again.

I need to find a way to reset the internal states of the driver accordingly.

Thanks for your support.

No response required - will work on the fix on the weekend....

regards,

Philipp