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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.c49
1 files changed, 44 insertions, 5 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index fce2cb2112d8..adfad4fd6a13 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -264,8 +264,10 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child)
if (base <= limit) {
res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO;
- res->start = base;
- res->end = limit + 0xfff;
+ if (!res->start)
+ res->start = base;
+ if (!res->end)
+ res->end = limit + 0xfff;
}
res = child->resource[1];
@@ -431,7 +433,7 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max
{
struct pci_bus *child;
int is_cardbus = (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS);
- u32 buses, i;
+ u32 buses, i, j = 0;
u16 bctl;
pci_read_config_dword(dev, PCI_PRIMARY_BUS, &buses);
@@ -541,10 +543,29 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max
* as cards with a PCI-to-PCI bridge can be
* inserted later.
*/
- for (i=0; i<CARDBUS_RESERVE_BUSNR; i++)
+ for (i=0; i<CARDBUS_RESERVE_BUSNR; i++) {
+ struct pci_bus *parent = bus;
if (pci_find_bus(pci_domain_nr(bus),
max+i+1))
break;
+ while (parent->parent) {
+ if ((!pcibios_assign_all_busses()) &&
+ (parent->subordinate > max) &&
+ (parent->subordinate <= max+i)) {
+ j = 1;
+ }
+ parent = parent->parent;
+ }
+ if (j) {
+ /*
+ * Often, there are two cardbus bridges
+ * -- try to leave one valid bus number
+ * for each one.
+ */
+ i /= 2;
+ break;
+ }
+ }
max += i;
pci_fixup_parent_subordinate_busnr(child, max);
}
@@ -559,6 +580,22 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max
sprintf(child->name, (is_cardbus ? "PCI CardBus #%02x" : "PCI Bus #%02x"), child->number);
+ while (bus->parent) {
+ if ((child->subordinate > bus->subordinate) ||
+ (child->number > bus->subordinate) ||
+ (child->number < bus->number) ||
+ (child->subordinate < bus->number)) {
+ printk(KERN_WARNING "PCI: Bus #%02x (-#%02x) may be "
+ "hidden behind%s bridge #%02x (-#%02x)%s\n",
+ child->number, child->subordinate,
+ bus->self->transparent ? " transparent" : " ",
+ bus->number, bus->subordinate,
+ pcibios_assign_all_busses() ? " " :
+ " (try 'pci=assign-busses')");
+ }
+ bus = bus->parent;
+ }
+
return max;
}
@@ -571,6 +608,7 @@ static void pci_read_irq(struct pci_dev *dev)
unsigned char irq;
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &irq);
+ dev->pin = irq;
if (irq)
pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
dev->irq = irq;
@@ -624,6 +662,7 @@ static int pci_setup_device(struct pci_dev * dev)
/* The PCI-to-PCI bridge spec requires that subtractive
decoding (i.e. transparent) bridge must have programming
interface code of 0x01. */
+ pci_read_irq(dev);
dev->transparent = ((dev->class & 0xff) == 1);
pci_read_bases(dev, 2, PCI_ROM_ADDRESS1);
break;
@@ -678,7 +717,7 @@ static void pci_release_dev(struct device *dev)
* reading the dword at 0x100 which must either be 0 or a valid extended
* capability header.
*/
-static int pci_cfg_space_size(struct pci_dev *dev)
+int pci_cfg_space_size(struct pci_dev *dev)
{
int pos;
u32 status;