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Date:   Fri, 1 Dec 2017 18:02:24 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Vinod Koul <vinod.koul@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        ALSA <alsa-devel@...a-project.org>, Mark <broonie@...nel.org>,
        Takashi <tiwai@...e.de>, patches.audio@...el.com,
        alan@...ux.intel.com,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Sagar Dharia <sdharia@...eaurora.org>,
        srinivas.kandagatla@...aro.org, plai@...eaurora.org,
        Sudheer Papothi <spapothi@...eaurora.org>
Subject: Re: [alsa-devel] [PATCH v4 12/15] soundwire: cdns: Add sdw_master_ops
 and IO transfer support


>   struct sdw_cdns {
>   	struct device *dev;
>   	struct sdw_bus bus;
>   	unsigned int instance;
>   
> +	u32 response_buf[0x80];

last nit-pick: use a #define for the size.
Also are you sure about the value? I vaguely recall that the FIFO was 
32-deep, you are confusing bytes and words here?

> +	struct completion tx_complete;
> +	struct sdw_defer *defer;
> +
>   	void __iomem *registers;
>   
>   	bool link_up;
> +	unsigned int msg_count;
>   };
>   

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