USB: automatically enable wakeup for PCI host controllers

This patch (as1193b) enables wakeup during initialization for all PCI
host controllers, and it removes some code (and comments!) that are no
longer needed now that the PCI core automatically initializes wakeup
settings for all new devices.

The idea is that the bus should initialize wakeup, and the bus glue
or controller driver should enable it.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 6af47a0937b8..bdc6e86e1f8b 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -219,15 +219,19 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
         /* Serial Bus Release Number is at PCI 0x60 offset */
         pci_read_config_byte(pdev, 0x60, &ehci->sbrn);
 
-        /* Workaround current PCI init glitch:  wakeup bits aren't
-         * being set from PCI PM capability.
+        /* Keep this around for a while just in case some EHCI
+         * implementation uses legacy PCI PM support.  This test
+         * can be removed on 17 Dec 2009 if the dev_warn() hasn't
+         * been triggered by then.
          */
         if (!device_can_wakeup(&pdev->dev)) {
                 u16     port_wake;
 
                 pci_read_config_word(pdev, 0x62, &port_wake);
-                if (port_wake & 0x0001)
+                if (port_wake & 0x0001) {
+                        dev_warn(&pdev->dev, "Enabling legacy PCI PM\n");
                         device_init_wakeup(&pdev->dev, 1);
+                }
         }
 
 #ifdef  CONFIG_USB_SUSPEND