linux-kernel - Re: [PATCH] i2c: mediatek: Disable i2c start_en and clear intr

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Date:   Thu, 27 May 2021 22:14:56 +0200
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: Disable i2c start_en and clear intr_stat
 brfore reset

On Thu, May 27, 2021 at 08:04:04PM +0800, qii.wang@...iatek.com wrote:
> From: Qii Wang <qii.wang@...iatek.com>
> 
> The i2c controller driver do dma reset after transfer timeout,
> but sometimes dma reset will trigger an unexpected DMA_ERR irq.
> It will cause the i2c controller to continuously send interrupts
> to the system and cause soft lock-up. So we need to disable i2c
> start_en and clear intr_stat to stop i2c controller before dma
> reset when transfer timeout.
> 
> Signed-off-by: Qii Wang <qii.wang@...iatek.com>

Is there a suitable Fixes tag for this?


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