[Patch Part3 V3 19/21] iommu/vt-d: enhance error recovery in function intel_enable_irq_remapping()
Jiang Liu <[email protected]>
| Newsgroups | org.kernel.vger.linux-hotplug,dev.linux.lists.iommu,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pci |
|---|---|
| Message-ID | <[email protected]> |
Enhance error recovery in function intel_enable_irq_remapping() by tearing down all created data structures. Signed-off-by: Jiang Liu <[email protected]> --- drivers/iommu/intel_irq_remapping.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index 9f1c86566452..f65b68d3de10 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -673,9 +673,11 @@ static int __init intel_enable_irq_remapping(void) return eim ? IRQ_REMAP_X2APIC_MODE : IRQ_REMAP_XAPIC_MODE; error: - /* - * handle error condition gracefully here! - */ + for_each_iommu(iommu, drhd) + if (ecap_ir_support(iommu->ecap)) { + iommu_disable_irq_remapping(iommu); + intel_teardown_irq_remapping(iommu); + } if (x2apic_present) pr_warn("Failed to enable irq remapping. You are vulnerable to irq-injection attacks.\n"); -- 1.7.10.4