Commit 7b11428d authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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()
parents b8256b45 e523b38e
......@@ -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 */
......
......@@ -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 */
......
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