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path: root/drivers/pci/probe.c
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Diffstat (limited to 'drivers/pci/probe.c')
-rw-r--r--drivers/pci/probe.c22
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 26a55d08b506..005786416bb5 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -165,7 +165,7 @@ static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom)
if (l == 0xffffffff)
l = 0;
if ((l & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_MEMORY) {
- sz = pci_size(l, sz, PCI_BASE_ADDRESS_MEM_MASK);
+ sz = pci_size(l, sz, (u32)PCI_BASE_ADDRESS_MEM_MASK);
if (!sz)
continue;
res->start = l & PCI_BASE_ADDRESS_MEM_MASK;
@@ -215,7 +215,7 @@ static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom)
if (l == 0xffffffff)
l = 0;
if (sz && sz != 0xffffffff) {
- sz = pci_size(l, sz, PCI_ROM_ADDRESS_MASK);
+ sz = pci_size(l, sz, (u32)PCI_ROM_ADDRESS_MASK);
if (sz) {
res->flags = (l & IORESOURCE_ROM_ENABLE) |
IORESOURCE_MEM | IORESOURCE_PREFETCH |
@@ -402,6 +402,12 @@ static void pci_enable_crs(struct pci_dev *dev)
static void __devinit pci_fixup_parent_subordinate_busnr(struct pci_bus *child, int max)
{
struct pci_bus *parent = child->parent;
+
+ /* Attempts to fix that up are really dangerous unless
+ we're going to re-assign all bus numbers. */
+ if (!pcibios_assign_all_busses())
+ return;
+
while (parent->parent && parent->subordinate < max) {
parent->subordinate = max;
pci_write_config_byte(parent->self, PCI_SUBORDINATE_BUS, max);
@@ -478,8 +484,18 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max
* We need to assign a number to this bus which we always
* do in the second pass.
*/
- if (!pass)
+ if (!pass) {
+ if (pcibios_assign_all_busses())
+ /* Temporarily disable forwarding of the
+ configuration cycles on all bridges in
+ this bus segment to avoid possible
+ conflicts in the second pass between two
+ bridges programmed with overlapping
+ bus ranges. */
+ pci_write_config_dword(dev, PCI_PRIMARY_BUS,
+ buses & ~0xffffff);
return max;
+ }
/* Clear errors */
pci_write_config_word(dev, PCI_STATUS, 0xffff);
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