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iommu/vt-d: Take CONFIG_PCI_ATS into account

pci_dev::physfn is only available when CONFIG_PCI_ATS is set. The recentfix for the irqdomain rework missed that dependency which makes the buildfail when CONFIG_PCI_ATS=n.Add the necessary #ifdeffery.Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>Fixes:ff82872 ("iommu/vt-d: Cure VF irqdomain hickup")Signed-off-by: Thomas Gleixner <tglx@linutronix.de>Cc: Joerg Roedel <joro@8bytes.org>

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drivers/iommu/intel
- dmar.c

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`‎drivers/iommu/intel/dmar.c‎`

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Original file line number	Diff line number	Diff line change
`@@ -335,7 +335,9 @@ static void dmar_pci_bus_del_dev(struct dmar_pci_notify_info *info)`
`335`	`335`
`336`	`336`	`staticinlinevoidvf_inherit_msi_domain(structpci_dev*pdev)`
`337`	`337`	`{`
	`338`	`+#ifdefCONFIG_PCI_ATS`
`338`	`339`	`dev_set_msi_domain(&pdev->dev,dev_get_msi_domain(&pdev->physfn->dev));`
	`340`	`+#endif`
`339`	`341`	`}`
`340`	`342`
`341`	`343`	`staticintdmar_pci_bus_notifier(structnotifier_block*nb,`

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Commit8986f22

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`‎drivers/iommu/intel/dmar.c‎`

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