diff options
| -rw-r--r-- | drivers/vfio/vfio_iommu_type1.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 2328be628f21..92155cce926d 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -1169,13 +1169,21 @@ static bool vfio_iommu_has_sw_msi(struct iommu_group *group, phys_addr_t *base) INIT_LIST_HEAD(&group_resv_regions); iommu_get_group_resv_regions(group, &group_resv_regions); list_for_each_entry(region, &group_resv_regions, list) { + /* + * The presence of any 'real' MSI regions should take + * precedence over the software-managed one if the + * IOMMU driver happens to advertise both types. + */ + if (region->type == IOMMU_RESV_MSI) { + ret = false; + break; + } + if (region->type == IOMMU_RESV_SW_MSI) { *base = region->start; ret = true; - goto out; } } -out: list_for_each_entry_safe(region, next, &group_resv_regions, list) kfree(region); return ret; |