diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/dmar.c | 11 | ||||
| -rw-r--r-- | drivers/pci/intel-iommu.c | 4 |
2 files changed, 12 insertions, 3 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c index 25a00ce4f24..fa3a11365ec 100644 --- a/drivers/pci/dmar.c +++ b/drivers/pci/dmar.c @@ -173,12 +173,21 @@ dmar_parse_one_drhd(struct acpi_dmar_header *header) struct dmar_drhd_unit *dmaru; int ret = 0; + drhd = (struct acpi_dmar_hardware_unit *)header; + if (!drhd->address) { + /* Promote an attitude of violence to a BIOS engineer today */ + WARN(1, "Your BIOS is broken; DMAR reported at address zero!\n" + "BIOS vendor: %s; Ver: %s; Product Version: %s\n", + dmi_get_system_info(DMI_BIOS_VENDOR), + dmi_get_system_info(DMI_BIOS_VERSION), + dmi_get_system_info(DMI_PRODUCT_VERSION)); + return -ENODEV; + } dmaru = kzalloc(sizeof(*dmaru), GFP_KERNEL); if (!dmaru) return -ENOMEM; dmaru->hdr = header; - drhd = (struct acpi_dmar_hardware_unit *)header; dmaru->reg_base_addr = drhd->address; dmaru->segment = drhd->segment; dmaru->include_all = drhd->flags & 0x1; /* BIT0: INCLUDE_ALL */ diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index fb3a3f3fca7..001b328adf8 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -733,8 +733,8 @@ static void dma_pte_clear_range(struct dmar_domain *domain, u64 start, u64 end) start &= (((u64)1) << addr_width) - 1; end &= (((u64)1) << addr_width) - 1; /* in case it's partial page */ - start = PAGE_ALIGN(start); - end &= PAGE_MASK; + start &= PAGE_MASK; + end = PAGE_ALIGN(end); npages = (end - start) / VTD_PAGE_SIZE; /* we don't need lock here, nobody else touches the iova range */ |