linux-kernel - Re: [PATCH] ath11k: Silence clang -Wsometimes-uninitialized in ath11k_update_per_peer_stats_from

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Message-Id: <20200211142431.2B510C4479D@smtp.codeaurora.org>
Date:   Tue, 11 Feb 2020 14:24:31 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     ath11k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com,
        Nathan Chancellor <natechancellor@...il.com>,
        ci_notify@...aro.org
Subject: Re: [PATCH] ath11k: Silence clang -Wsometimes-uninitialized in
 ath11k_update_per_peer_stats_from_txcompl

Nathan Chancellor <natechancellor@...il.com> wrote:

> Clang warns a few times (trimmed for brevity):
> 
> ../drivers/net/wireless/ath/ath11k/debugfs_sta.c:185:7: warning:
> variable 'rate_idx' is used uninitialized whenever 'if' condition is
> false [-Wsometimes-uninitialized]
> 
> It is not wrong, rate_idx is only initialized in the first if block.
> However, this is not necessarily an issue in practice because rate_idx
> will only be used when initialized because
> ath11k_accumulate_per_peer_tx_stats only uses rate_idx when flags is not
> set to RATE_INFO_FLAGS_HE_MCS, RATE_INFO_FLAGS_VHT_MCS, or
> RATE_INFO_FLAGS_MCS. Still, it is not good to stick uninitialized values
> into another function so initialize it to zero to prevent any issues
> down the line.
> 
> Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
> Link: https://github.com/ClangBuiltLinux/linux/issues/832
> Reported-by: ci_notify@...aro.org
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
> Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
> Signed-off-by: Kalle Valo <kvalo@...eaurora.org>

Patch applied to ath-next branch of ath.git, thanks.

df57acc415b1 ath11k: Silence clang -Wsometimes-uninitialized in ath11k_update_per_peer_stats_from_txcompl

-- 
https://patchwork.kernel.org/patch/11357331/

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