linux-kernel - Re: [PATCH] iommu/vt-d: Return the correct dma mask when we are bypassing the IOMMU

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Date:   Thu, 10 Oct 2019 09:24:15 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Christoph Hellwig <hch@....de>
Cc:     baolu.lu@...ux.intel.com, Arvind Sankar <nivedita@...m.mit.edu>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iommu/vt-d: Return the correct dma mask when we are
 bypassing the IOMMU

Hi Christoph,

On 10/9/19 2:51 PM, Christoph Hellwig wrote:
> On Wed, Oct 09, 2019 at 10:45:15AM +0800, Lu Baolu wrote:
>> Do you mind explaining why we always return 32 bit here?
> 
> See the comment in dma_get_required_mask().
> 

Got it. Thank you.

Best regards,
Baolu