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iommu/omap: Change the attach detection logic
The OMAP IOMMU driver allows only a single device (eg: a rproc device) to be attached per domain. The current attach detection logic relies on a check for an attached iommu for the respective client device. Change this logic to use the client device pointer instead in preparation for supporting multiple iommu devices to be bound to a single iommu domain, and thereby to a client device. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
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