linux-kernel - Re: [PATCH] dmaengine: stm32-mdma: correct desc prep when channel running

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Date:   Mon, 16 Oct 2023 16:43:05 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        M'boumba Cedric Madianga <cedric.madianga@...il.com>,
        Pierre-Yves MORDRET <pierre-yves.mordret@...com>,
        Amelie Delaunay <amelie.delaunay@...s.st.com>
Cc:     Alain Volmat <alain.volmat@...s.st.com>, stable@...r.kernel.org,
        dmaengine@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dmaengine: stm32-mdma: correct desc prep when channel
 running


On Mon, 09 Oct 2023 10:24:50 +0200, Amelie Delaunay wrote:
> In case of the prep descriptor while the channel is already running, the
> CCR register value stored into the channel could already have its EN bit
> set.  This would lead to a bad transfer since, at start transfer time,
> enabling the channel while other registers aren't yet properly set.
> To avoid this, ensure to mask the CCR_EN bit when storing the ccr value
> into the mdma channel structure.
> 
> [...]

Applied, thanks!

[1/1] dmaengine: stm32-mdma: correct desc prep when channel running
      commit: 03f25d53b145bc2f7ccc82fc04e4482ed734f524

Best regards,
-- 
~Vinod