diff options
| author | Shaohua Li <shaohua.li@intel.com> | 2009-06-08 09:27:25 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-07-02 16:49:31 -0700 |
| commit | 376c10a25a8b73b90e67d2fa870bfda288fa067d (patch) | |
| tree | 5705102c431c05488740fc81d94aaa457e0c8d30 /drivers/pci | |
| parent | 9d3d447703cec0582ff5a5756aeb07e4593f9cb6 (diff) | |
PCI: disable ASPM on VIA root-port-under-bridge configurations
commit 8e822df700694ca6850d1e0c122fd7004b2778d8 upstream.
VIA has a strange chipset, it has root port under a bridge. Disable ASPM
for such strange chipset.
Tested-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pcie/aspm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index b0367f168af4..777b2c76caf5 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -638,6 +638,10 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev) if (pdev->pcie_type != PCI_EXP_TYPE_ROOT_PORT && pdev->pcie_type != PCI_EXP_TYPE_DOWNSTREAM) return; + /* VIA has a strange chipset, root port is under a bridge */ + if (pdev->pcie_type == PCI_EXP_TYPE_ROOT_PORT && + pdev->bus->self) + return; down_read(&pci_bus_sem); if (list_empty(&pdev->subordinate->devices)) goto out; |