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From: Kalle Valo <kvalo@codeaurora.org>
To: Nathan Chancellor <nathan@kernel.org>
Cc: Ping-Ke Shih <pkshih@realtek.com>,
	Colin Ian King <colin.king@canonical.com>,
	linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com,
	llvm@lists.linux.dev, Nathan Chancellor <nathan@kernel.org>
Subject: Re: [PATCH] rtlwifi: rtl8192de: Fix initialization of place in _rtl92c_phy_get_rightchnlplace()
Date: Sun, 29 Aug 2021 07:28:42 +0000 (UTC)	[thread overview]
Message-ID: <20210829072842.C771CC43618@smtp.codeaurora.org> (raw)
In-Reply-To: <20210823222014.764557-1-nathan@kernel.org>

Nathan Chancellor <nathan@kernel.org> wrote:

> Clang warns:
> 
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:901:6: warning:
> variable 'place' is used uninitialized whenever 'if' condition is false
> [-Wsometimes-uninitialized]
>         if (chnl > 14) {
>             ^~~~~~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:909:9: note:
> uninitialized use occurs here
>         return place;
>                ^~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:901:2: note: remove
> the 'if' if its condition is always true
>         if (chnl > 14) {
>         ^~~~~~~~~~~~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:899:10: note:
> initialize the variable 'place' to silence this warning
>         u8 place;
>                 ^
>                  = '\0'
> 1 warning generated.
> 
> Commit 369956ae5720 ("rtlwifi: rtl8192de: Remove redundant variable
> initializations") removed the initialization of place but it appears
> that this removal was in the wrong function.
> 
> _rtl92c_phy_get_rightchnlplace() returns place's value at the end of the
> function so now if the if statement is false, place never gets
> initialized. Add that initialization back to address the warning.
> 
> place's initialization is not necessary in
> rtl92d_get_rightchnlplace_for_iqk() as place is only used within the if
> statement so it can be removed, which is likely what was intended in the
> first place.
> 
> Fixes: 369956ae5720 ("rtlwifi: rtl8192de: Remove redundant variable initializations")
> Signed-off-by: Nathan Chancellor <nathan@kernel.org>
> Acked-by: Ping-Ke Shih <pkshih@realtek.com>
> Reviewed-by: Kees Cook <keescook@chromium.org>

Patch applied to wireless-drivers-next.git, thanks.

533ccdae76fa rtlwifi: rtl8192de: Fix initialization of place in _rtl92c_phy_get_rightchnlplace()

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20210823222014.764557-1-nathan@kernel.org/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches


      parent reply	other threads:[~2021-08-29  7:28 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-23 22:20 Nathan Chancellor
2021-08-24  1:45 ` Pkshih
2021-08-26  2:36 ` Kees Cook
2021-08-29  7:28 ` Kalle Valo [this message]

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