Messages in this thread Patch in this message | | | From | Feng Wu <> | Subject | [v6 8/8] iommu, x86: Properly handler PI for IOMMU hotplug | Date | Thu, 21 May 2015 14:59:15 +0800 |
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Return error when inserting a new IOMMU which doesn't support PI if PI is currently in use.
Signed-off-by: Feng Wu <feng.wu@intel.com> --- drivers/iommu/intel_irq_remapping.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index 776b65a..a0de9b9 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -1347,6 +1347,9 @@ int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert) return -EINVAL; if (!ecap_ir_support(iommu->ecap)) return 0; + if (irq_remapping_cap(IRQ_POSTING_CAP) && + !cap_pi_support(iommu->cap)) + return -EBUSY; if (insert) { if (!iommu->ir_table) -- 2.1.0
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