linux-kernel - Re: [PATCH v3 3/5] iommu: Add iommu_get_domain_for_dev

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Message-ID: <aLTZk8sK4WOX9RLk@Asurada-Nvidia>
Date: Sun, 31 Aug 2025 16:24:03 -0700
From: Nicolin Chen <nicolinc@...dia.com>
To: "Tian, Kevin" <kevin.tian@...el.com>
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Subject: Re: [PATCH v3 3/5] iommu: Add iommu_get_domain_for_dev_locked()
 helper

Hi Kevin,

On Thu, Aug 21, 2025 at 07:41:57AM -0700, Nicolin Chen wrote:
> On Thu, Aug 21, 2025 at 08:07:01AM +0000, Tian, Kevin wrote:
> > Usually the difference between func() and func_locked() is only about
> > whether the caller holds a lock. If they mean to return different
> > domains, may need better naming (though I don't have a good option
> > now)...
> 
> Yea, naming is tricky here :)
> 
> Perhaps it could follow a different pattern:
>     iommu_dev_get_domain_for_driver(struct device *dev);
> 
> With a simple note highlighting to be used by IOMMU drivers in the
> iommu callback functions like attach_dev.

I am keeping this "_locked" naming in v4, as there are only two
places calling this new helper and only one of them is a driver.

Please check v4 and see if you still prefer a different name.

Thanks
Nic