linux-kernel - Re: [PATCH] iwlwifi: mvm: Fix bitwise vs logical operator in iwl_mvm_scan

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Date:   Mon, 16 Aug 2021 11:45:34 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Luca Coelho <luciano.coelho@...el.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: Re: [PATCH] iwlwifi: mvm: Fix bitwise vs logical operator in iwl_mvm_scan_fits()

On Sat, Aug 14, 2021 at 4:43 PM Nathan Chancellor <nathan@...nel.org> wrote:
>
> Clang warns:
>
> drivers/net/wireless/intel/iwlwifi/mvm/scan.c:835:3: warning: bitwise
> and of boolean expressions; did you mean logical and?
> [-Wbool-operation-and]
>                 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
>                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>                                                                     &&
> 1 warning generated.
>
> Replace the bitwise AND with a logical one to solve the warning, which
> is clearly what was intended.
>
> Fixes: 999d2568ee0c ("iwlwifi: mvm: combine scan size checks into a common function")
> Signed-off-by: Nathan Chancellor <nathan@...nel.org>

Thanks for the patch!
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>

> ---
>  drivers/net/wireless/intel/iwlwifi/mvm/scan.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
> index 0368b7101222..494379fc9224 100644
> --- a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
> +++ b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
> @@ -832,7 +832,7 @@ static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
>                                      int n_channels)
>  {
>         return ((n_ssids <= PROBE_OPTION_MAX) &&
> -               (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
> +               (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &&
>                 (ies->common_ie_len +
>                  ies->len[NL80211_BAND_2GHZ] +
>                  ies->len[NL80211_BAND_5GHZ] <=
>
> base-commit: ba31f97d43be41ca99ab72a6131d7c226306865f
> --
> 2.33.0.rc2
>


-- 
Thanks,
~Nick Desaulniers