From: Lu Baolu <baolu.lu@linux.intel.com>
To: Christoph Hellwig <hch@lst.de>
Cc: baolu.lu@linux.intel.com, David Woodhouse <dwmw2@infradead.org>,
Joerg Roedel <joro@8bytes.org>,
ashok.raj@intel.com, jacob.jun.pan@intel.com,
kevin.tian@intel.com, Robin Murphy <robin.murphy@arm.com>,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: Re: [PATCH 1/3] iommu/vt-d: Refactor find_domain() helper
Date: Thu, 1 Aug 2019 14:20:07 +0800 [thread overview]
Message-ID: <40f3a736-0a96-0491-61ad-0ddf03612d91@linux.intel.com> (raw)
In-Reply-To: <20190801061021.GA14955@lst.de>
Hi Christoph,
On 8/1/19 2:10 PM, Christoph Hellwig wrote:
> On Thu, Aug 01, 2019 at 02:01:54PM +0800, Lu Baolu wrote:
>> + /* No lock here, assumes no domain exit in normal case */
>
> s/exit/exists/ ?
This comment is just moved from one place to another in this patch.
"no domain exit" means "the domain isn't freed". (my understand)
>
>> + info = dev->archdata.iommu;
>> + if (likely(info))
>> + return info->domain;
>
> But then again the likely would be odd.
>
Normally there's a domain for a device (default domain or isolation
domain for assignment cases).
Best regards,
Baolu
next prev parent reply other threads:[~2019-08-01 6:20 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-01 6:01 [PATCH 0/3] iommu/vtd: Per device dma ops Lu Baolu
2019-08-01 6:01 ` [PATCH 1/3] iommu/vt-d: Refactor find_domain() helper Lu Baolu
2019-08-01 6:10 ` Christoph Hellwig
2019-08-01 6:20 ` Lu Baolu [this message]
2019-08-01 14:09 ` Christoph Hellwig
2019-08-02 2:06 ` Lu Baolu
2019-08-01 6:01 ` [PATCH 2/3] iommu/vt-d: Apply per-device dma_ops Lu Baolu
2019-08-06 6:43 ` Christoph Hellwig
2019-08-07 3:06 ` Lu Baolu
2019-08-13 7:38 ` Lu Baolu
2019-08-01 6:01 ` [PATCH 3/3] iommu/vt-d: Cleanup after using per-device dma ops Lu Baolu
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