From: Wolfram Sang <wsa@the-dreams.de>
To: qii.wang@mediatek.com
Cc: matthias.bgg@gmail.com, linux-i2c@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org,
srv_heupstream@mediatek.com, leilk.liu@mediatek.com
Subject: Re: [PATCH] i2c: mediatek: Disable i2c start_en and clear intr_stat brfore reset
Date: Thu, 27 May 2021 22:14:56 +0200 [thread overview]
Message-ID: <YK/9wMhoACc0beN/@kunai> (raw)
In-Reply-To: <1622117044-7583-1-git-send-email-qii.wang@mediatek.com>
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On Thu, May 27, 2021 at 08:04:04PM +0800, qii.wang@mediatek.com wrote:
> From: Qii Wang <qii.wang@mediatek.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@mediatek.com>
Is there a suitable Fixes tag for this?
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WARNING: multiple messages have this Message-ID (diff)
From: Wolfram Sang <wsa@the-dreams.de>
To: qii.wang@mediatek.com
Cc: matthias.bgg@gmail.com, linux-i2c@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org,
srv_heupstream@mediatek.com, leilk.liu@mediatek.com
Subject: Re: [PATCH] i2c: mediatek: Disable i2c start_en and clear intr_stat brfore reset
Date: Thu, 27 May 2021 22:14:56 +0200 [thread overview]
Message-ID: <YK/9wMhoACc0beN/@kunai> (raw)
In-Reply-To: <1622117044-7583-1-git-send-email-qii.wang@mediatek.com>
[-- Attachment #1.1: Type: text/plain, Size: 584 bytes --]
On Thu, May 27, 2021 at 08:04:04PM +0800, qii.wang@mediatek.com wrote:
> From: Qii Wang <qii.wang@mediatek.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@mediatek.com>
Is there a suitable Fixes tag for this?
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_______________________________________________
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http://lists.infradead.org/mailman/listinfo/linux-mediatek
WARNING: multiple messages have this Message-ID (diff)
From: Wolfram Sang <wsa@the-dreams.de>
To: qii.wang@mediatek.com
Cc: matthias.bgg@gmail.com, linux-i2c@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org,
srv_heupstream@mediatek.com, leilk.liu@mediatek.com
Subject: Re: [PATCH] i2c: mediatek: Disable i2c start_en and clear intr_stat brfore reset
Date: Thu, 27 May 2021 22:14:56 +0200 [thread overview]
Message-ID: <YK/9wMhoACc0beN/@kunai> (raw)
In-Reply-To: <1622117044-7583-1-git-send-email-qii.wang@mediatek.com>
[-- Attachment #1.1: Type: text/plain, Size: 584 bytes --]
On Thu, May 27, 2021 at 08:04:04PM +0800, qii.wang@mediatek.com wrote:
> From: Qii Wang <qii.wang@mediatek.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@mediatek.com>
Is there a suitable Fixes tag for this?
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_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-05-27 20:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-27 12:04 [PATCH] i2c: mediatek: Disable i2c start_en and clear intr_stat brfore reset qii.wang
2021-05-27 12:04 ` qii.wang
2021-05-27 12:04 ` qii.wang
2021-05-27 20:14 ` Wolfram Sang [this message]
2021-05-27 20:14 ` Wolfram Sang
2021-05-27 20:14 ` Wolfram Sang
2021-05-28 1:37 ` Qii Wang
2021-05-28 1:37 ` Qii Wang
2021-05-28 1:37 ` Qii Wang
2021-05-28 8:13 ` Wolfram Sang
2021-05-28 8:13 ` Wolfram Sang
2021-05-28 8:13 ` Wolfram Sang
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