linux-kernel - build failure of next-20220818 due to 341dd1f7de4c ("wifi: rtw88: add the update channel flow to support setting by parameters")

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Message-ID: <Yv4lFKIoek8Fhv44@debian>
Date:   Thu, 18 Aug 2022 12:40:04 +0100
From:   "Sudip Mukherjee (Codethink)" <sudipm.mukherjee@...il.com>
To:     Chih-Kang Chang <gary.chang@...ltek.com>,
        Ping-Ke Shih <pkshih@...ltek.com>,
        Kalle Valo <kvalo@...nel.org>
Cc:     Yan-Hsuan Chuang <tony0620emma@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-next@...r.kernel.org,
        clang-built-linux <llvm@...ts.linux.dev>,
        Nathan Chancellor <nathan@...nel.org>
Subject: build failure of next-20220818 due to 341dd1f7de4c ("wifi: rtw88:
 add the update channel flow to support setting by parameters")

Hi All,

Not sure if it has been reported, clang builds of arm64 allmodconfig have
failed to build next-20220818 with the error:

drivers/net/wireless/realtek/rtw88/main.c:731:2: error: variable 'primary_channel_idx' is used uninitialized whenever switch default is taken [-Werror,-Wsometimes-uninitialized]
        default:
        ^~~~~~~
drivers/net/wireless/realtek/rtw88/main.c:754:39: note: uninitialized use occurs here
        hal->current_primary_channel_index = primary_channel_idx;
                                             ^~~~~~~~~~~~~~~~~~~

git bisect pointed to 341dd1f7de4c ("wifi: rtw88: add the update channel flow to support setting by parameters").
And, reverting that commit has fixed the build failure.

I will be happy to test any patch or provide any extra log if needed.


--
Regards
Sudip