When checking if a PCI to PCI bridge should be enabled to decode
memory and/or IO resources, we need to look at all device
resources not just the first 6. This is needed to allow PCI
bridges to pass down memory and IO accesses to child devices
even when the bridge itself does not consume resources in its
PCI BARs.
Signed-off-by: Rajesh Shah <[EMAIL PROTECTED]>
---
linux-2.6.11-mm4-iohp-rshah1/arch/ia64/pci/pci.c | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)
diff -puN arch/ia64/pci/pci.c~fix-ia64-pcibios_enable_resources
arch/ia64/pci/pci.c
--- linux-2.6.11-mm4-iohp/arch/ia64/pci/pci.c~fix-ia64-pcibios_enable_resources
2005-03-16 13:07:02.055015329 -0800
+++ linux-2.6.11-mm4-iohp-rshah1/arch/ia64/pci/pci.c 2005-03-16
13:07:02.164390328 -0800
@@ -436,18 +436,24 @@ pcibios_enable_resources (struct pci_dev
u16 cmd, old_cmd;
int idx;
struct resource *r;
+ unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM;
if (!dev)
return -EINVAL;
pci_read_config_word(dev, PCI_COMMAND, &cmd);
old_cmd = cmd;
- for (idx=0; idx<6; idx++) {
+ for (idx=0; idx<PCI_NUM_RESOURCES; idx++) {
/* Only set up the desired resources. */
if (!(mask & (1 << idx)))
continue;
r = &dev->resource[idx];
+ if (!(r->flags & type_mask))
+ continue;
+ if ((idx == PCI_ROM_RESOURCE) &&
+ (!(r->flags & IORESOURCE_ROM_ENABLE)))
+ continue;
if (!r->start && r->end) {
printk(KERN_ERR
"PCI: Device %s not available because of
resource collisions\n",
@@ -459,8 +465,6 @@ pcibios_enable_resources (struct pci_dev
if (r->flags & IORESOURCE_MEM)
cmd |= PCI_COMMAND_MEMORY;
}
- if (dev->resource[PCI_ROM_RESOURCE].start)
- cmd |= PCI_COMMAND_MEMORY;
if (cmd != old_cmd) {
printk("PCI: Enabling device %s (%04x -> %04x)\n",
pci_name(dev), old_cmd, cmd);
pci_write_config_word(dev, PCI_COMMAND, cmd);
_
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
