From: root <[email protected]> It's ok to disable iommu in normal kernel. While there's no need to disable it in kdump kernel after the on-flight dma issue has heen fixed.
Signed-off-by: Baoquan He <[email protected]> --- drivers/iommu/amd_iommu_init.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 8b4bac978062..880f693c809b 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -2494,7 +2494,8 @@ static int __init early_amd_iommu_init(void) goto out; /* Disable any previously enabled IOMMUs */ - disable_iommus(); + if (amd_iommu_disabled) + disable_iommus(); if (amd_iommu_irq_remap) amd_iommu_irq_remap = check_ioapic_information(); -- 2.5.5
