diff options
| author | Huang Ying <ying.huang@intel.com> | 2012-08-08 09:07:38 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-08-21 17:31:40 -0600 |
| commit | 4f9c1397e2e80e52b17ec4e39760caa807bd15c7 (patch) | |
| tree | 60007cc7b7511df5db7e6705929ba01d9a96b97d /drivers/pci/pci.c | |
| parent | a6b881a5b8d4fa2135e55a74be6d6b1e17e445dd (diff) | |
| download | linux-4f9c1397e2e80e52b17ec4e39760caa807bd15c7.tar.gz | |
PCI/PM: Enable D3/D3cold by default for most devices
This patch fixes the following bug: http://marc.info/?l=linux-usb&m=134318961120825&w=2 Originally, device lower power states include D1, D2, D3. After that, D3 is further divided into D3hot and D3cold. To support both scenario safely, original D3 is mapped to D3cold. When adding D3cold support, because worry about some device may have broken D3cold support, D3cold is disabled by default. This disable D3 on original platform too. But some original platform may only have working D3, but no working D1, D2. The root cause of the above bug is it too. To deal with this, this patch enables D3/D3cold by default for most devices. This restores the original behavior. For some devices that suspected to have broken D3cold support, such as PCIe port, D3cold is disabled by default. Reported-by: Bjorn Mork <bjorn@mork.no> Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index f3ea977a5b1b..ab4bf5a4c2f1 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1941,6 +1941,7 @@ void pci_pm_init(struct pci_dev *dev) dev->pm_cap = pm; dev->d3_delay = PCI_PM_D3_WAIT; dev->d3cold_delay = PCI_PM_D3COLD_WAIT; + dev->d3cold_allowed = true; dev->d1_support = false; dev->d2_support = false; |