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Commit e36c455c authored by Pavel Machek's avatar Pavel Machek Committed by Greg Kroah-Hartman
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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: default avatarPavel Machek <pavel@suse.cz>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent c54c1879

drivers/pci/pci.c

+8 −7
Original line number Diff line number Diff line
@@ -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);