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This patch disables suspend/resume on machines with AMD IOMMU enabled. Real suspend/resume support for AMD IOMMU is currently being worked on. Until this is ready it will be disabled to avoid data corruption when the IOMMU is not properly re-enabled at resume. The patch is based on a similar patch for the GART driver written by Pavel Machek. The overall driver merged into tip/master is tested with parallel disk and network loads and showed no problems in a test running for 3 days. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>