linux-kernel - Re: [alsa-devel] [PATCH 2/4] soundwire: add enumeration

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Message-ID: <af5a7f19-045a-d4a8-8e17-99307724ac3f@linux.intel.com>
Date:   Mon, 4 Nov 2019 08:32:57 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        tiwai@...e.de, broonie@...nel.org, gregkh@...uxfoundation.org,
        jank@...ence.com, srinivas.kandagatla@...aro.org,
        slawomir.blauciak@...el.com,
        Bard liao <yung-chuan.liao@...ux.intel.com>,
        Rander Wang <rander.wang@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>
Subject: Re: [alsa-devel] [PATCH 2/4] soundwire: add enumeration_complete
 structure



On 11/3/19 12:22 AM, Vinod Koul wrote:
> On 23-10-19, 16:06, Pierre-Louis Bossart wrote:
>> We need an async mechanism to prevent access to Slaves that are not
>> fully-enumerated.
>>
>> init_completion() will be invoked when the Slave becomes UNATTACHED,
>> and complete() will be invoked when the state become ATTACHED. Any
>> read/write before this status change will be delayed with a
>> wait_for_completion().
>>
>> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
>> ---
>>   include/linux/soundwire/sdw.h | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
>> index a381a596212b..1381edfaa206 100644
>> --- a/include/linux/soundwire/sdw.h
>> +++ b/include/linux/soundwire/sdw.h
>> @@ -565,6 +565,7 @@ struct sdw_slave {
>>   	u16 dev_num;
>>   	bool probed;
>>   	struct completion probe_complete;
>> +	struct completion enumeration_complete;
> 
> Which series/patch uses this..?

[PATCH 00/18] soundwire: code hardening and suspend-resume support