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 25a00ce4f24d3f3a897c159f48d0b931200add54..fa3a11365ec32ba407c3da7894d71e9a95401215 100644 (file)
--- 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 fb3a3f3fca7a4835aab7fef7bb45edd84a2df182..001b328adf804e1e75d9c561df9e704b424b5468 100644 (file)
--- 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 */