linux-kernel - Re: [PATCH] i2c: mediatek: move dma reset before i2c reset

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Message-ID: <20201103211312.GG1583@kunai>
Date:   Tue, 3 Nov 2020 22:13:12 +0100
From:   Wolfram Sang <wsa@...-dreams.de>
To:     qii.wang@...iatek.com
Cc:     matthias.bgg@...il.com, linux-i2c@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, srv_heupstream@...iatek.com,
        leilk.liu@...iatek.com
Subject: Re: [PATCH] i2c: mediatek: move dma reset before i2c reset

On Fri, Oct 30, 2020 at 07:58:01PM +0800, qii.wang@...iatek.com wrote:
> From: Qii Wang <qii.wang@...iatek.com>
> 
> The i2c driver default do dma reset after i2c reset, but sometimes
> i2c reset will trigger dma tx2rx, then apdma write data to dram
> which has been i2c_put_dma_safe_msg_buf(kfree). Move dma reset
> before i2c reset in mtk_i2c_init_hw to fix it.
> 
> Signed-off-by: Qii Wang <qii.wang@...iatek.com>

Applied to for-current, thanks!


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