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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>
This commit is contained in:
Pavel Machek 2007-01-16 12:17:13 +01:00 committed by Greg Kroah-Hartman
parent c54c187907
commit e36c455c2f
1 changed files with 8 additions and 7 deletions
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15
drivers/pci/pci.c
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@ -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);