linux-kernel - Re: [PATCH v1 1/2] dmaengine: idxd: Protect int

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Date:   Mon, 30 Oct 2023 11:56:09 -0700
From:   Fenghua Yu <fenghua.yu@...el.com>
To:     'Guanjun' <guanjun@...ux.alibaba.com>, <dave.jiang@...el.com>,
        <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <vkoul@...nel.org>, <tony.luck@...el.com>
CC:     <jing.lin@...el.com>, <ashok.raj@...el.com>,
        <sanjay.k.kumar@...el.com>, <megha.dey@...el.com>,
        <jacob.jun.pan@...el.com>, <yi.l.liu@...el.com>,
        <tglx@...utronix.de>
Subject: Re: [PATCH v1 1/2] dmaengine: idxd: Protect int_handle field in hw
 descriptor



On 10/29/23 01:00, 'Guanjun' wrote:
> From: Guanjun <guanjun@...ux.alibaba.com>
> 
> The int_handle field in hw descriptor should also be protected
> by wmb() before possibly triggering a DMA read.
> 
> Signed-off-by: Guanjun <guanjun@...ux.alibaba.com>

As Dave said, need to add fixes tag.

Reviewed-by: Fenghua Yu <fenghua.yu@...el.com>

Thanks.

-Fenghua Yu