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SubjectRe: [patch 3/7] Check root chipset no_msi flag instead of all parent busses flags
Grant Grundler wrote:
> I still don't want the generic PCI code to assume a "root"
> PCI Host bus controller was found after that loop.

If I am not mistaken, we can use the following code to check whether we
found a root chipset:
unsigned cap;
u16 val;
u8 ext_type;
cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
if (cap) {
pci_read_config_word(pdev, cap + PCI_CAP_FLAGS, &val);
ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
if (ext_type == PCI_EXP_TYPE_ROOT_PORT)
<check no_msi flag>
}

Brice

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