linux-kernel - Re: [PATCH] soundwire: cadence: Don't overwrite msg->buf during write commands

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Message-ID: <YylJB+GfMxQL3ogS@matsya>
Date:   Tue, 20 Sep 2022 10:30:55 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Richard Fitzgerald <rf@...nsource.cirrus.com>
Cc:     yung-chuan.liao@...ux.intel.com,
        pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        patches@...nsource.cirrus.com
Subject: Re: [PATCH] soundwire: cadence: Don't overwrite msg->buf during
 write commands

On 16-09-22, 11:35, Richard Fitzgerald wrote:
> The buf passed in struct sdw_msg must only be written for a READ,
> in that case the RDATA part of the response is the data value of the
> register.
> 
> For a write command there is no RDATA, and buf should be assumed to
> be const and unmodifable. The original caller should not expect its data
> buffer to be corrupted by an sdw_nwrite().

Applied, thanks

-- 
~Vinod