Merge git://git.infradead.org/iommu-2.6
* git://git.infradead.org/iommu-2.6:
intel-iommu: Avoid panic() for DRHD at address zero.
Intel-IOMMU Alignment Issue in dma_pte_clear_range()
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 25a00ce..fa3a113 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -173,12 +173,21 @@
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 fb3a3f3..001b328 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -733,8 +733,8 @@
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 */