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| author | Pavel Machek <pavel@ucw.cz> | 2007-01-16 12:17:13 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-02-07 15:50:06 -0800 |
| commit | e36c455c2f5fee08fed395e94c7ab156cd159360 (patch) | |
| tree | cfe0e29851b49893083108601bbee4ca9d38dc9e /drivers/pci/pci.c | |
| parent | c54c18790700b8b2a503945d729aa425c25691fe (diff) | |
| download | linux-e36c455c2f5fee08fed395e94c7ab156cd159360.tar.gz linux-e36c455c2f5fee08fed395e94c7ab156cd159360.tar.bz2 linux-e36c455c2f5fee08fed395e94c7ab156cd159360.zip | |
PCI: power management: remove noise on non-manageable hw
Return early from pci_set_power_state() if hardware does not support
power management. This way, we do not generate noise in the logs.
Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index e91dcc05b790..7ae709024456 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -392,6 +392,14 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state) if (state > PCI_D3hot) state = PCI_D3hot; + /* + * If the device or the parent bridge can't support PCI PM, ignore + * the request if we're doing anything besides putting it into D0 + * (which would only happen on boot). + */ + if ((state == PCI_D1 || state == PCI_D2) && pci_no_d1d2(dev)) + return 0; + /* Validate current state: * Can enter D0 from any state, but if we can only go deeper * to sleep if we're already in a low power state @@ -403,13 +411,6 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state) } else if (dev->current_state == state) return 0; /* we're already there */ - /* - * If the device or the parent bridge can't support PCI PM, ignore - * the request if we're doing anything besides putting it into D0 - * (which would only happen on boot). - */ - if ((state == PCI_D1 || state == PCI_D2) && pci_no_d1d2(dev)) - return 0; /* find PCI PM capability in list */ pm = pci_find_capability(dev, PCI_CAP_ID_PM); |