linux-kernel - RE: [PATCH v5 4/7] iommu/vt-d: Factoring out PASID set up helper function

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Date:   Fri, 28 Apr 2023 09:47:45 +0000
From:   "Tian, Kevin" <kevin.tian@...el.com>
To:     Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        Robin Murphy <robin.murphy@....com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>,
        "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "vkoul@...nel.org" <vkoul@...nel.org>
CC:     Will Deacon <will@...nel.org>,
        David Woodhouse <dwmw2@...radead.org>,
        "Raj, Ashok" <ashok.raj@...el.com>,
        "Liu, Yi L" <yi.l.liu@...el.com>,
        "Yu, Fenghua" <fenghua.yu@...el.com>,
        "Jiang, Dave" <dave.jiang@...el.com>,
        "Luck, Tony" <tony.luck@...el.com>,
        "Zanussi, Tom" <tom.zanussi@...el.com>,
        "Ranganathan, Narayan" <narayan.ranganathan@...el.com>
Subject: RE: [PATCH v5 4/7] iommu/vt-d: Factoring out PASID set up helper
 function

> From: Jacob Pan <jacob.jun.pan@...ux.intel.com>
> Sent: Friday, April 28, 2023 1:50 AM
> 
> 
> +static int dmar_domain_attach_device_pasid(struct dmar_domain *domain,
> +					   struct intel_iommu *iommu,
> +					   struct device *dev, ioasid_t pasid)
> +{
> +	int ret;
> +
> +	/* PASID table is mandatory for a PCI device in scalable mode. */
> +	if (!sm_supported(iommu) && dev_is_real_dma_subdevice(dev))
> +		return -EOPNOTSUPP;

"&&" should be "||"