linux-kernel - Re: [PATCH v2 3/6] ASoC: codecs: lpass-wsa-macro: add dapm widgets and route

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 3 Nov 2020 12:31:35 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        broonie@...nel.org
Cc:     devicetree@...r.kernel.org, alsa-devel@...a-project.org,
        lgirdwood@...il.com, linux-kernel@...r.kernel.org,
        robh+dt@...nel.org
Subject: Re: [PATCH v2 3/6] ASoC: codecs: lpass-wsa-macro: add dapm widgets
 and route



On 29/10/2020 15:52, Pierre-Louis Bossart wrote:
> 
>> +static int wsa_macro_enable_mix_path(struct snd_soc_dapm_widget *w,
>> +                     struct snd_kcontrol *kcontrol, int event)
>> +{
>> +    struct snd_soc_component *component = 
>> snd_soc_dapm_to_component(w->dapm);
>> +    u16 gain_reg;
>> +    int offset_val = 0;
>> +    int val = 0;
>> +
>> +    switch (w->reg) {
>> +    case CDC_WSA_RX0_RX_PATH_MIX_CTL:
>> +        gain_reg = CDC_WSA_RX0_RX_VOL_MIX_CTL;
>> +        break;
>> +    case CDC_WSA_RX1_RX_PATH_MIX_CTL:
>> +        gain_reg = CDC_WSA_RX1_RX_VOL_MIX_CTL;
>> +        break;
>> +    default:
>> +        return 0;
>> +    }
>> +
>> +    switch (event) {
>> +    case SND_SOC_DAPM_POST_PMU:
>> +        val = snd_soc_component_read(component, gain_reg);
>> +        val += offset_val;
>> +        snd_soc_component_write(component, gain_reg, val);
> 
> missed from v1: offset_val is zero so the sequence is reading and 
> writing the same thing. Is this intentional or useful?

Its useless, I should get rid of offset_val!

> 
>> +        break;
>> +    case SND_SOC_DAPM_POST_PMD:
>> +        snd_soc_component_update_bits(component, w->reg,
>> +                          CDC_WSA_RX_PATH_MIX_CLK_EN_MASK,
>> +                          CDC_WSA_RX_PATH_MIX_CLK_DISABLE);
>> +        break;
>> +    }
>> +
>> +    return 0;
>> +}
>> +
> 
> [...]
> 
>> +static bool wsa_macro_adie_lb(struct snd_soc_component *component,
>> +                  int interp_idx)
>> +{
>> +    u16 int_mux_cfg0 = 0, int_mux_cfg1 = 0;
> 
> these inits are ignored
> 
>> +    u8 int_mux_cfg0_val = 0, int_mux_cfg1_val = 0;
> 
> these as well
> 
>> +    u8 int_n_inp0 = 0, int_n_inp1 = 0, int_n_inp2 = 0;
> 
> and these are also ignored.
> 
Yes, these are ignored, I should have removed the unnecessary 
initialization!
It would have been nice if sparse could catch such errors!

are you using tool to catch these?

--srini
>> +    int_mux_cfg0 = CDC_WSA_RX_INP_MUX_RX_INT0_CFG0 + interp_idx * 8;
>> +    int_mux_cfg1 = int_mux_cfg0 + 4;
>> +    int_mux_cfg0_val = snd_soc_component_read(component, int_mux_cfg0);
>> +    int_mux_cfg1_val = snd_soc_component_read(component, int_mux_cfg1);
>> +
>> +    int_n_inp0 = int_mux_cfg0_val & 0x0F;
>> +    if (int_n_inp0 == INTn_1_INP_SEL_DEC0 ||
>> +        int_n_inp0 == INTn_1_INP_SEL_DEC1)
>> +        return true;
>> +
>> +    int_n_inp1 = int_mux_cfg0_val >> 4;
>> +    if (int_n_inp1 == INTn_1_INP_SEL_DEC0 ||
>> +        int_n_inp1 == INTn_1_INP_SEL_DEC1)
>> +        return true;
>> +
>> +    int_n_inp2 = int_mux_cfg1_val >> 4;
>> +    if (int_n_inp2 == INTn_1_INP_SEL_DEC0 ||
>> +        int_n_inp2 == INTn_1_INP_SEL_DEC1)
>> +        return true;
>> +
>> +    return false;
>> +}
>