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Commit 571dbbd4 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu/vt-d: Don't disable IR when it was previously enabled 



Keep it enabled in kdump kernel to guarantee interrupt
delivery.

Tested-by: default avatarZhenHua Li <zhen-hual@hp.com>
Tested-by: default avatarBaoquan He <bhe@redhat.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 7c3c9876

drivers/iommu/intel_irq_remapping.c

+2 −4
Original line number Diff line number Diff line
@@ -742,9 +742,6 @@ static int __init intel_prepare_irq_remapping(void) 
			pr_info("%s does not support EIM\n", iommu->name);

			eim = 0;

		}



		/* Disable IRQ remapping if it is already enabled */

		iommu_disable_irq_remapping(iommu);

	}



	eim_mode = eim;
@@ -777,6 +774,7 @@ static int __init intel_enable_irq_remapping(void) 
	 * Setup Interrupt-remapping for all the DRHD's now.

	 */

	for_each_iommu(iommu, drhd) {

		if (!ir_pre_enabled(iommu))

			iommu_enable_irq_remapping(iommu);

		setup = true;

	}