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Commit 51acce33 authored by Jiang Liu's avatar Jiang Liu Committed by Joerg Roedel
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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: default avatarJiang Liu <jiang.liu@linux.intel.com>
Reviewed-by: default avatarYijing Wang <wangyijing@huawei.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent a7a3dad9

drivers/iommu/intel_irq_remapping.c

+5 −3
Original line number Diff line number Diff line
@@ -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");