Re: [bisection] b0119e87083 iommu: Introduce new 'struct iommu_device' ==> boom

From: Joerg Roedel
Date: Tue Feb 21 2017 - 10:18:59 EST


Hi Mike,

thanks for the report, this didn't trigger in my local testing here.
Loosk like I need to test without intel_iommu=on too :/

Anyway, can you check whether the attached patch helps?

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index d9c0decfc91a..a74fec8d266a 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1108,8 +1108,10 @@ static int alloc_iommu(struct dmar_drhd_unit *drhd)

static void free_iommu(struct intel_iommu *iommu)
{
- iommu_device_sysfs_remove(&iommu->iommu);
- iommu_device_unregister(&iommu->iommu);
+ if (intel_iommu_enabled) {
+ iommu_device_sysfs_remove(&iommu->iommu);
+ iommu_device_unregister(&iommu->iommu);
+ }

if (iommu->irq) {
if (iommu->pr_irq) {