Merge tag 'pci-v3.19-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...

[pandora-kernel.git] / drivers / pci / probe.c

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index a9e34ca..23212f8 100644 (file)
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -397,15 +397,16 @@ static void pci_read_bridge_mmio_pref(struct pci_bus *child)
 {
        struct pci_dev *dev = child->self;
        u16 mem_base_lo, mem_limit_lo;
-       unsigned long base, limit;
+       u64 base64, limit64;
+       dma_addr_t base, limit;
        struct pci_bus_region region;
        struct resource *res;
 
        res = child->resource[2];
        pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo);
        pci_read_config_word(dev, PCI_PREF_MEMORY_LIMIT, &mem_limit_lo);
-       base = ((unsigned long) mem_base_lo & PCI_PREF_RANGE_MASK) << 16;
-       limit = ((unsigned long) mem_limit_lo & PCI_PREF_RANGE_MASK) << 16;
+       base64 = (mem_base_lo & PCI_PREF_RANGE_MASK) << 16;
+       limit64 = (mem_limit_lo & PCI_PREF_RANGE_MASK) << 16;
 
        if ((mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) {
                u32 mem_base_hi, mem_limit_hi;
@@ -419,17 +420,20 @@ static void pci_read_bridge_mmio_pref(struct pci_bus *child)
                 * this, just assume they are not being used.
                 */
                if (mem_base_hi <= mem_limit_hi) {
-#if BITS_PER_LONG == 64
-                       base |= ((unsigned long) mem_base_hi) << 32;
-                       limit |= ((unsigned long) mem_limit_hi) << 32;
-#else
-                       if (mem_base_hi || mem_limit_hi) {
-                               dev_err(&dev->dev, "can't handle 64-bit address space for bridge\n");
-                               return;
-                       }
-#endif
+                       base64 |= (u64) mem_base_hi << 32;
+                       limit64 |= (u64) mem_limit_hi << 32;
                }
        }
+
+       base = (dma_addr_t) base64;
+       limit = (dma_addr_t) limit64;
+
+       if (base != base64) {
+               dev_err(&dev->dev, "can't handle bridge window above 4GB (bus address %#010llx)\n",
+                       (unsigned long long) base64);
+               return;
+       }
+
        if (base <= limit) {
                res->flags = (mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) |
                                         IORESOURCE_MEM | IORESOURCE_PREFETCH;
@@ -1313,7 +1317,7 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
                        ~hpp->pci_exp_devctl_and, hpp->pci_exp_devctl_or);
 
        /* Initialize Link Control Register */
-       if (dev->subordinate)
+       if (pcie_cap_has_lnkctl(dev))
                pcie_capability_clear_and_set_word(dev, PCI_EXP_LNKCTL,
                        ~hpp->pci_exp_lnkctl_and, hpp->pci_exp_lnkctl_or);