[PATCH] usbcore: allow suspend/resume even if drivers don't support it
Alan Stern [Wed, 21 Dec 2005 22:28:11 +0000 (14:28 -0800)]
This patch (as618) changes usbcore to prevent derailing the
suspend/resume sequence when a USB driver doesn't include support for
it.  This is a workaround rather than a true fix; the core needs to be
changed so that URB submissions from suspended drivers can be refused
and outstanding URBs cancelled.

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

drivers/usb/core/usb.c

index e197ce9..e80ef94 100644 (file)
@@ -1432,7 +1432,8 @@ static int usb_generic_suspend(struct device *dev, pm_message_t message)
                        mark_quiesced(intf);
        } else {
                // FIXME else if there's no suspend method, disconnect...
-               dev_warn(dev, "no %s?\n", "suspend");
+               dev_warn(dev, "no suspend for driver %s?\n", driver->name);
+               mark_quiesced(intf);
                status = 0;
        }
        return status;
@@ -1460,8 +1461,10 @@ static int usb_generic_resume(struct device *dev)
        }
 
        if ((dev->driver == NULL) ||
-           (dev->driver_data == &usb_generic_driver_data))
+           (dev->driver_data == &usb_generic_driver_data)) {
+               dev->power.power_state.event = PM_EVENT_FREEZE;
                return 0;
+       }
 
        intf = to_usb_interface(dev);
        driver = to_usb_driver(dev->driver);
@@ -1481,7 +1484,7 @@ static int usb_generic_resume(struct device *dev)
                        mark_quiesced(intf);
                }
        } else
-               dev_warn(dev, "no %s?\n", "resume");
+               dev_warn(dev, "no resume for driver %s?\n", driver->name);
        return 0;
 }