linux-kernel - Re: [PATCH v4 3/6] iommu: Add return value rules to attach

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Date:   Thu, 22 Sep 2022 01:38:54 -0700
From:   Nicolin Chen <nicolinc@...dia.com>
To:     "Tian, Kevin" <kevin.tian@...el.com>
CC:     "joro@...tes.org" <joro@...tes.org>,
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Subject: Re: [PATCH v4 3/6] iommu: Add return value rules to attach_dev op
 and APIs

On Thu, Sep 22, 2022 at 08:17:03AM +0000, Tian, Kevin wrote:
> External email: Use caution opening links or attachments
> 
> 
> > From: Nicolin Chen <nicolinc@...dia.com>
> > Sent: Wednesday, September 21, 2022 4:23 PM
> >
> >
> > +/**
> > + * iommu_attach_device - Attach a device to an IOMMU domain
> > + * @domain: IOMMU domain to attach
> > + * @dev: Device that will be attached
> > + *
> > + * Returns 0 on success and error code on failure
> > + *
> > + * Note that EINVAL may be returned as a soft failure if the domain and
> > device
> > + * are incompatible due to some previous configuration of the domain, in
> > which
> > + * case attaching the same device to a different domain may succeed.
> 
> Revise a bit:
> 
>  * Note that EINVAL can be treated as a soft failure, indicating
>  * that certain configuration of the domain is incompatible with
>  * the device. In this case attaching a different domain to the
>  * device may succeed.

Done. And added all your "Reviewed-by" too. Thanks!