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 16:31:34 -0700 |
| commit | 8a94b68f58fb15880b0ad5401def3fa9b83f9e80 (patch) | |
| tree | 01bb8dde742e7b8d423282e5f8cd10fa558907ad /drivers/pci | |
| parent | c66a1c990f0f9ec38765ca5c54953523326e18d5 (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 e4df84b3ba81..def3398d1374 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -633,6 +633,10 @@ 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; |