diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 3dcb83d7eb250c5171ff5eb7cb9cc1c410ae09ed..e179af3186f56b8298faee43d8106516de349d3c 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -294,7 +294,7 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 		return -EIO; 
 
 	pci_read_config_word(dev,pm + PCI_PM_PMC,&pmc);
-	if ((pmc & PCI_PM_CAP_VER_MASK) > 2) {
+	if ((pmc & PCI_PM_CAP_VER_MASK) > 3) {
 		printk(KERN_DEBUG
 		       "PCI: %s has unsupported PM cap regs version (%u)\n",
 		       pci_name(dev), pmc & PCI_PM_CAP_VER_MASK);
@@ -302,12 +302,10 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 	}
 
 	/* check if this device supports the desired state */
-	if (state == PCI_D1 || state == PCI_D2) {
-		if (state == PCI_D1 && !(pmc & PCI_PM_CAP_D1))
-			return -EIO;
-		else if (state == PCI_D2 && !(pmc & PCI_PM_CAP_D2))
-			return -EIO;
-	}
+	if (state == PCI_D1 && !(pmc & PCI_PM_CAP_D1))
+		return -EIO;
+	else if (state == PCI_D2 && !(pmc & PCI_PM_CAP_D2))
+		return -EIO;
 
 	pci_read_config_word(dev, pm + PCI_PM_CTRL, &pmcsr);
 
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 4be1b887ab62831014e9ba4f6ea2014ddd169651..b9c9b03919d449ff967f7359bbd6049fe15c0dc4 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -584,7 +584,7 @@ static int pci_setup_device(struct pci_dev * dev)
 		 dev->vendor, dev->device, class, dev->hdr_type);
 
 	/* "Unknown power state" */
-	dev->current_state = 4;
+	dev->current_state = PCI_UNKNOWN;
 
 	/* Early fixups, before probing the BARs */
 	pci_fixup_device(pci_fixup_early, dev);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index b0e244713281c379ee646334a7146fb5d941f329..7004dde7fef0732c48b49dccc487e1d5854b92d2 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -75,6 +75,7 @@ typedef int __bitwise pci_power_t;
 #define PCI_D2		((pci_power_t __force) 2)
 #define PCI_D3hot	((pci_power_t __force) 3)
 #define PCI_D3cold	((pci_power_t __force) 4)
+#define PCI_UNKNOWN	((pci_power_t __force) 5)
 #define PCI_POWER_ERROR	((pci_power_t __force) -1)
 
 /*