From: Jiang Liu Date: Sun, 9 Nov 2014 14:48:01 +0000 (+0800) Subject: iommu/vt-d: Enhance error recovery in function intel_enable_irq_remapping() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=51acce33c4df6ee23b5ad4c2e6c239e0d6f25771;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git iommu/vt-d: Enhance error recovery in function intel_enable_irq_remapping() Enhance error recovery in function intel_enable_irq_remapping() by tearing down all created data structures. Signed-off-by: Jiang Liu Reviewed-by: Yijing Wang Signed-off-by: Joerg Roedel --- diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index 7af0b56dc2d1..27541d440849 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -702,9 +702,11 @@ 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");