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

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Date:   Sun, 3 Nov 2019 10:52:43 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
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: [PATCH 2/4] soundwire: add enumeration_complete structure

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..?

Thanks
-- 
~Vinod