On Mon, Jan 31, 2005 at 01:40:04PM -0600, Brian King wrote:
CC'ing the linux-pci mailing list...
thanks...
This patch adds an arch hook so
that individual archs can indicate if the underlying system supports
expanded config space accesses or not.
@@ -653,6 +653,8 @@ static int pci_cfg_space_size(struct pci
goto fail;
}
+ if (!pcibios_exp_cfg_space(dev))
+ goto fail;
if (pci_read_config_dword(dev, 256, &status) != PCIBIOS_SUCCESSFUL)
goto fail;
pci_read_config_dword lands in arch specific code.
See drivers/pci/access.c:PCI_OP_READ() macro.
I'm missing what pcibios_exp_cfg_space() does that can't be handled by
the bus_ops supplied by pci_scan_bus().
I would expect the pci_read_config_dword to fail for being out of bounds.
Is that wrong?
Or is bus_ops not feasible in this case because pcibios needs access
to pci_dev?