linux-kernel - Re: [alsa-devel] [RFC PATCH 09/40] soundwire: cadence_master: fix usage of CONFIG

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Date:   Fri, 26 Jul 2019 08:33:06 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Bard liao <yung-chuan.liao@...ux.intel.com>,
        alsa-devel@...a-project.org
Cc:     tiwai@...e.de, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, vkoul@...nel.org, broonie@...nel.org,
        srinivas.kandagatla@...aro.org, jank@...ence.com,
        slawomir.blauciak@...el.com, Sanyog Kale <sanyog.r.kale@...el.com>
Subject: Re: [alsa-devel] [RFC PATCH 09/40] soundwire: cadence_master: fix
 usage of CONFIG_UPDATE


>> @@ -758,15 +774,9 @@ static int _cdns_enable_interrupt(struct sdw_cdns 
>> *cdns)
>>    */
>>   int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns)
>>   {
>> -    int ret;
>> -
>>       _cdns_enable_interrupt(cdns);
>> -    ret = cdns_clear_bit(cdns, CDNS_MCP_CONFIG_UPDATE,
>> -                 CDNS_MCP_CONFIG_UPDATE_BIT);
>> -    if (ret < 0)
>> -        dev_err(cdns->dev, "Config update timedout\n");
>> -    return ret;
> Should we add cdns_update_config() here?

indeed, this would be a good improvement. The code works because we 
added the exit_reset() sequence which does call cdns_update_config(), 
but better make this function self-contained. When we enable the 
clock-stop mode we will not do this reset sequence.