From 7ad820e43330bbf974792c5ab4e2c2355e08d597 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Fri, 16 Jun 2017 16:09:59 +0200 Subject: [PATCH] iommu/amd: Free IOMMU resources when disabled on command line After we made sure that all IOMMUs have been disabled we need to make sure that all resources we allocated are released again. Signed-off-by: Joerg Roedel --- drivers/iommu/amd_iommu_init.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 8cc507f96f3a..128f9665c326 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -2430,6 +2430,13 @@ static int __init state_next(void) case IOMMU_IVRS_DETECTED: ret = early_amd_iommu_init(); init_state = ret ? IOMMU_INIT_ERROR : IOMMU_ACPI_FINISHED; + if (init_state == IOMMU_ACPI_FINISHED && amd_iommu_disabled) { + pr_info("AMD-Vi: AMD IOMMU disabled on kernel command-line\n"); + free_dma_resources(); + free_iommu_resources(); + init_state = IOMMU_CMDLINE_DISABLED; + ret = -EINVAL; + } break; case IOMMU_ACPI_FINISHED: early_enable_iommus();