[PATCH] PCI: Fix off-by-one in pci_enable_wake

Fix off-by-one in pci_enable_wake.
Bit field location determined by mask, not value.
Signed-off-by: Roger Luethi <rl@hellgate.ch>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/pci/pci.c

@@ -442,7 +442,7 @@ int pci_enable_wake(struct pci_dev *dev, u32 state, int enable)
 	pci_read_config_word(dev,pm+PCI_PM_PMC,&value);
 
 	value &= PCI_PM_CAP_PME_MASK;
-	value >>= ffs(value);   /* First bit of mask */
+	value >>= ffs(PCI_PM_CAP_PME_MASK) - 1;   /* First bit of mask */
 
 	/* Check if it can generate PME# from requested state. */
 	if (!value || !(value & (1 << state)))