From: Alan Stern <stern@rowland.harvard.edu>
Date: Wed, 21 Dec 2005 22:28:11 +0000 (-0800)
Subject: [PATCH] usbcore: allow suspend/resume even if drivers don't support it
X-Git-Tag: v2.6.15~15^2~3
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=5a9191ff683ce4ebfd2c6a15e2989f5b1f420321;p=linux-2.6-omap-h63xx.git

[PATCH] usbcore: allow suspend/resume even if drivers don't support it

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>
---

diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index e197ce9353d..e80ef946782 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -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;
 }