linux-kernel - Re: linux-next: build warnings after merge of the wireless-drivers-next tree

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Message-ID: <871s6evtra.fsf@kamboji.qca.qualcomm.com>
Date:   Wed, 19 Dec 2018 09:51:53 +0200
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Wireless <linux-wireless@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Sara Sharon <sara.sharon@...el.com>,
        Luca Coelho <luciano.coelho@...el.com>,
        Kees Cook <keescook@...gle.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        David Miller <davem@...emloft.net>,
        Networking <netdev@...r.kernel.org>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>
Subject: Re: linux-next: build warnings after merge of the wireless-drivers-next tree

Stephen Rothwell <sfr@...b.auug.org.au> writes:

> On Fri, 30 Nov 2018 12:05:55 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>>
>> After merging the wireless-drivers-next tree, today's linux-next build
>> (x86_64 allmodconfig) produced these warnings:
>> 
>> drivers/net/wireless/intel/iwlwifi/iwl-drv.c: In function 'iwl_parse_tlv_firmware':
>> drivers/net/wireless/intel/iwlwifi/iwl-drv.c:1098:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
>>     if (iwlwifi_mod_params.enable_ini)
>>        ^
>> drivers/net/wireless/intel/iwlwifi/iwl-drv.c:1100:3: note: here
>>    default:
>>    ^~~~~~~
>> drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c: In function 'iwl_parse_fw_dbg_tlv':
>> drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c:203:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
>>     iwl_fw_dbg_copy_tlv(trans, tlv, true);
>>     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c:204:3: note: here
>>    default:
>>    ^~~~~~~
>> 
>> Introduced by commit
>> 
>>   f14cda6f3b31 ("iwlwifi: trans: parse and store debug ini TLVs")
>> 
>> These are noted because I use -Wimplict-fallthrough
>> 
>> The warnings can be suppressed by adding a comment like
>> 	/* fall through */
>> at the appropriate place to indicate that the fallthough is intended.
>
> I am still seeing these warnings (but in the net-next tree now) and I
> do not see a fix patch in the wireless-drivers-next tree.

Luca did submit a patch[1] for cfg80211 to fix those but I don't see any
patches for iwlwifi (even in the one pending pull request he sent), not
sure what happened. I know that Luca is already on holidays but adding
Emmanuel, maybe he can help here?

[1] https://patchwork.kernel.org/patch/10732065/

-- 
Kalle Valo