Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into sh/for-2.6.31

5 files changed, 40 insertions, 44 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d1430ef6b4f9..738bdc6b0f8b 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1913,25 +1913,26 @@ config DMAR_DEFAULT_ON
           recommended you say N here while the DMAR code remains
           experimental.
 
-config DMAR_GFX_WA
-        def_bool y
-        prompt "Support for Graphics workaround"
+config DMAR_BROKEN_GFX_WA
+        def_bool n
+        prompt "Workaround broken graphics drivers (going away soon)"
         depends on DMAR
         ---help---
           Current Graphics drivers tend to use physical address
           for DMA and avoid using DMA APIs. Setting this config
           option permits the IOMMU driver to set a unity map for
           all the OS-visible memory. Hence the driver can continue
-          to use physical addresses for DMA.
+          to use physical addresses for DMA, at least until this
+          option is removed in the 2.6.32 kernel.
 
 config DMAR_FLOPPY_WA
         def_bool y
         depends on DMAR
         ---help---
-          Floppy disk drivers are know to bypass DMA API calls
+          Floppy disk drivers are known to bypass DMA API calls
           thereby failing to work when IOMMU is enabled. This
           workaround will setup a 1:1 mapping for the first
-          16M to make floppy (an ISA device) work.
+          16MiB to make floppy (an ISA device) work.
 
 config INTR_REMAP
         bool "Support for Interrupt Remapping (EXPERIMENTAL)"
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 6c327b852e23..430d5b24af7b 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -26,6 +26,8 @@ CFLAGS_tsc.o		:= $(nostackp)
 CFLAGS_paravirt.o       := $(nostackp)
 GCOV_PROFILE_vsyscall_64.o      := n
 GCOV_PROFILE_hpet.o             := n
+GCOV_PROFILE_tsc.o              := n
+GCOV_PROFILE_paravirt.o         := n
 
 obj-y                   := process_$(BITS).o signal.o entry_$(BITS).o
 obj-y                   += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 47630479b067..1a041bcf506b 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -211,11 +211,11 @@ static __init int iommu_setup(char *p)
 #ifdef CONFIG_SWIOTLB
                 if (!strncmp(p, "soft", 4))
                         swiotlb = 1;
+#endif
                 if (!strncmp(p, "pt", 2)) {
                         iommu_pass_through = 1;
                         return 1;
                 }
-#endif
 
                 gart_parse_options(p);
 
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index b26626dc517c..1014eb4bfc37 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -68,6 +68,10 @@ setup_resource(struct acpi_resource *acpi_res, void *data)
         unsigned long flags;
         struct resource *root;
         int max_root_bus_resources = PCI_BUS_NUM_RESOURCES;
+        u64 start, end;
+
+        if (bus_has_transparent_bridge(info->bus))
+                max_root_bus_resources -= 3;
 
         status = resource_to_addr(acpi_res, &addr);
         if (!ACPI_SUCCESS(status))
@@ -84,25 +88,24 @@ setup_resource(struct acpi_resource *acpi_res, void *data)
         } else
                 return AE_OK;
 
-        res = &info->res[info->res_num];
-        res->name = info->name;
-        res->flags = flags;
-        res->start = addr.minimum + addr.translation_offset;
-        res->end = res->start + addr.address_length - 1;
-        res->child = NULL;
-
-        if (bus_has_transparent_bridge(info->bus))
-                max_root_bus_resources -= 3;
+        start = addr.minimum + addr.translation_offset;
+        end = start + addr.address_length - 1;
         if (info->res_num >= max_root_bus_resources) {
                 printk(KERN_WARNING "PCI: Failed to allocate 0x%lx-0x%lx "
                         "from %s for %s due to _CRS returning more than "
-                        "%d resource descriptors\n", (unsigned long) res->start,
-                        (unsigned long) res->end, root->name, info->name,
+                        "%d resource descriptors\n", (unsigned long) start,
+                        (unsigned long) end, root->name, info->name,
                         max_root_bus_resources);
-                info->res_num++;
                 return AE_OK;
         }
 
+        res = &info->res[info->res_num];
+        res->name = info->name;
+        res->flags = flags;
+        res->start = start;
+        res->end = end;
+        res->child = NULL;
+
         if (insert_resource(root, res)) {
                 printk(KERN_ERR "PCI: Failed to allocate 0x%lx-0x%lx "
                         "from %s for %s\n", (unsigned long) res->start,
@@ -115,23 +118,6 @@ setup_resource(struct acpi_resource *acpi_res, void *data)
 }
 
 static void
-adjust_transparent_bridge_resources(struct pci_bus *bus)
-{
-        struct pci_dev *dev;
-
-        list_for_each_entry(dev, &bus->devices, bus_list) {
-                int i;
-                u16 class = dev->class >> 8;
-
-                if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) {
-                        for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++)
-                                dev->subordinate->resource[i] =
-                                                dev->bus->resource[i - 3];
-                }
-        }
-}
-
-static void
 get_current_resources(struct acpi_device *device, int busnum,
                         int domain, struct pci_bus *bus)
 {
@@ -158,8 +144,6 @@ get_current_resources(struct acpi_device *device, int busnum,
         info.res_num = 0;
         acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
                                 &info);
-        if (info.res_num)
-                adjust_transparent_bridge_resources(bus);
 
         return;
 
@@ -222,8 +206,15 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int do
                  */
                 memcpy(bus->sysdata, sd, sizeof(*sd));
                 kfree(sd);
-        } else
-                bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
+        } else {
+                bus = pci_create_bus(NULL, busnum, &pci_root_ops, sd);
+                if (bus) {
+                        if (pci_probe & PCI_USE__CRS)
+                                get_current_resources(device, busnum, domain,
+                                                        bus);
+                        bus->subordinate = pci_scan_child_bus(bus);
+                }
+        }
 
         if (!bus)
                 kfree(sd);
@@ -238,8 +229,6 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int do
 #endif
         }
 
-        if (bus && (pci_probe & PCI_USE__CRS))
-                get_current_resources(device, busnum, domain, bus);
         return bus;
 }
 
diff --git a/arch/x86/pci/amd_bus.c b/arch/x86/pci/amd_bus.c
index f893d6a6e803..3ffa10df20b9 100644
--- a/arch/x86/pci/amd_bus.c
+++ b/arch/x86/pci/amd_bus.c
@@ -100,8 +100,9 @@ void x86_pci_root_bus_res_quirks(struct pci_bus *b)
         int j;
         struct pci_root_info *info;
 
-        /* don't go for it if _CRS is used */
-        if (pci_probe & PCI_USE__CRS)
+        /* don't go for it if _CRS is used already */
+        if (b->resource[0] != &ioport_resource ||
+            b->resource[1] != &iomem_resource)
                 return;
 
         /* if only one root bus, don't need to anything */
@@ -116,6 +117,9 @@ void x86_pci_root_bus_res_quirks(struct pci_bus *b)
         if (i == pci_root_num)
                 return;
 
+        printk(KERN_DEBUG "PCI: peer root bus %02x res updated from pci conf\n",
+                        b->number);
+
         info = &pci_root_info[i];
         for (j = 0; j < info->res_num; j++) {
                 struct resource *res;