[PATCH] PCI: Support PCM PM CAP version 3
- support PCI PM CAP version 3 (as defined in PCI PM Interface Spec v1.2)
- pci/probe.c sets the PM state initially to 4 which is D3cold. add a
PCI_UNKNOWN
- minor cleanups
Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 3dcb83d..e179af3 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -294,7 +294,7 @@
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 @@
}
/* 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 4be1b88..b9c9b03 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -584,7 +584,7 @@
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 b0e2447..7004dde 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -75,6 +75,7 @@
#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)
/*