netdev - Re: [PATCH] wifi: mac80211: Use subsystem appropriate debug call

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Date: Thu, 21 Dec 2023 13:57:50 +0800
From: "Ma, Jun" <majun@....com>
To: Kalle Valo <kvalo@...nel.org>,
 Mario Limonciello <mario.limonciello@....com>
Cc: majun@....com, Johannes Berg <johannes@...solutions.net>,
 "David S . Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>,
 "open list:MAC80211" <linux-wireless@...r.kernel.org>,
 "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>,
 open list <linux-kernel@...r.kernel.org>, Jun Ma <Jun.ma2@....com>
Subject: Re: [PATCH] wifi: mac80211: Use subsystem appropriate debug call

Hi,

On 12/18/2023 11:17 PM, Kalle Valo wrote:
> Mario Limonciello <mario.limonciello@....com> writes:
> 
>> mac80211 doesn't use dev_dbg() but instead various macros from
>> net/mac80211/debug.h. Adjust wbrf code to use wiphy_dbg() instead.
>>
>> Cc: Jun Ma <Jun.ma2@....com>
>> Reported-by: kvalo@...nel.org
>> Closes:
>> https://lore.kernel.org/amd-gfx/8bd60010-7534-4c22-9337-c4219946d8d6@amd.com/T/#mfe2f29372c45130d27745912faf33d9f7ce50118
>> Fixes: d34be4310cbe ("wifi: mac80211: Add support for WBRF features")
>> Signed-off-by: Mario Limonciello <mario.limonciello@....com>
>> ---
>>  net/mac80211/wbrf.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/net/mac80211/wbrf.c b/net/mac80211/wbrf.c
>> index a05c5b971789..12c23e14f884 100644
>> --- a/net/mac80211/wbrf.c
>> +++ b/net/mac80211/wbrf.c
>> @@ -23,8 +23,8 @@ void ieee80211_check_wbrf_support(struct ieee80211_local *local)
>>  		return;
>>  
>>  	local->wbrf_supported = acpi_amd_wbrf_supported_producer(dev);
>> -	dev_dbg(dev, "WBRF is %s supported\n",
>> -		local->wbrf_supported ? "" : "not");
>> +	wiphy_dbg(wiphy, "WBRF is %s supported\n",
>> +		  local->wbrf_supported ? "" : "not");
>>  }
> 
> This won't work, I still see the debug message:
> 
> [  333.765867] ieee80211 phy0: WBRF is not supported
> 
> The issue seems to be that mac80211 defines DEBUG in
> net/mac80211/Makefile:
> 
> ccflags-y += -DDEBUG
> 
> That -DDEBUG should be cleaned up, but I think separately. It's just
> that I cannot come up with any good proposal, all the macros in
> net/mac80211/debug.h require sdata and we don't have that in this stage.
> Any ideas?

I will submit a patch that only compiles wbrf.c when CONFIG_AMD_WBRF=y

Regards,
Ma Jun


>