linux-kernel - Re: [PATCH v3 01/12] ASoC: codecs: wcd937x: set the comp soundwire port correctly

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Message-ID: <08afe342-e108-4f0c-9903-fb4df4eb860e@oss.qualcomm.com>
Date: Fri, 5 Sep 2025 17:47:42 +0100
From: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: broonie@...nel.org, lgirdwood@...il.com, tiwai@...e.com, vkoul@...nel.org,
        srini@...nel.org, yung-chuan.liao@...ux.intel.com,
        pierre-louis.bossart@...ux.dev, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, neil.armstrong@...aro.org,
        krzysztof.kozlowski@...aro.org, linux-sound@...r.kernel.org,
        Stable@...r.kernel.org
Subject: Re: [PATCH v3 01/12] ASoC: codecs: wcd937x: set the comp soundwire
 port correctly

On 9/5/25 5:14 PM, Dmitry Baryshkov wrote:
> On Fri, Sep 05, 2025 at 04:44:19PM +0100, Srinivas Kandagatla wrote:
>> For some reason we endup with setting soundwire port for
>> HPHL_COMP and HPHR_COMP as zero, this can potentially result
>> in a memory corruption due to accessing and setting -1 th element of
>> port_map array.
> 
> Nit: if passing 0 here might result in a memory corrution, then
> corresponding code should be fixed to warn loudly and ignore that 0.

Agreed, This is something that should be fixed at source am on it.

--srini

> 
>>
>> Fixes: 82be8c62a38c ("ASoC: codecs: wcd937x: add basic controls")
>> Cc: <Stable@...r.kernel.org>
>> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
>> ---
>>  sound/soc/codecs/wcd937x.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/sound/soc/codecs/wcd937x.c b/sound/soc/codecs/wcd937x.c
>> index 3b0a8cc314e0..de2dff3c56d3 100644
>> --- a/sound/soc/codecs/wcd937x.c
>> +++ b/sound/soc/codecs/wcd937x.c
>> @@ -2046,9 +2046,9 @@ static const struct snd_kcontrol_new wcd937x_snd_controls[] = {
>>  	SOC_ENUM_EXT("RX HPH Mode", rx_hph_mode_mux_enum,
>>  		     wcd937x_rx_hph_mode_get, wcd937x_rx_hph_mode_put),
>>  
>> -	SOC_SINGLE_EXT("HPHL_COMP Switch", SND_SOC_NOPM, 0, 1, 0,
>> +	SOC_SINGLE_EXT("HPHL_COMP Switch", WCD937X_COMP_L, 0, 1, 0,
>>  		       wcd937x_get_compander, wcd937x_set_compander),
>> -	SOC_SINGLE_EXT("HPHR_COMP Switch", SND_SOC_NOPM, 1, 1, 0,
>> +	SOC_SINGLE_EXT("HPHR_COMP Switch", WCD937X_COMP_R, 1, 1, 0,
>>  		       wcd937x_get_compander, wcd937x_set_compander),
>>  
>>  	SOC_SINGLE_TLV("HPHL Volume", WCD937X_HPH_L_EN, 0, 20, 1, line_gain),
>> -- 
>> 2.50.0
>>
>