From stern@rowland.harvard.edu Thu Feb 1 13:08:50 2007 From: Alan Stern Date: Thu, 1 Feb 2007 16:08:41 -0500 (EST) Subject: usbcore: small changes to hub driver's suspend method To: Greg KH Cc: David Brownell Message-ID: This patch (as847) makes some small changes to the hub driver's suspend method: For root hubs, the status URB should be unlinked and other activity stopped _before_ the bus_suspend method is called. The test for hdev->bus being NULL has been removed, since it can never succeed. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 25 ++++++++++--------------- 1 file changed, 10 insertions(+), 15 deletions(-) --- gregkh-2.6.orig/drivers/usb/core/hub.c +++ gregkh-2.6/drivers/usb/core/hub.c @@ -1904,6 +1904,7 @@ static int hub_suspend(struct usb_interf struct usb_hub *hub = usb_get_intfdata (intf); struct usb_device *hdev = hub->hdev; unsigned port1; + int status = 0; /* fail if children aren't already suspended */ for (port1 = 1; port1 <= hdev->maxchild; port1++) { @@ -1927,24 +1928,18 @@ static int hub_suspend(struct usb_interf dev_dbg(&intf->dev, "%s\n", __FUNCTION__); + /* stop khubd and related activity */ + hub_quiesce(hub); + /* "global suspend" of the downstream HC-to-USB interface */ if (!hdev->parent) { - struct usb_bus *bus = hdev->bus; - if (bus) { - int status = hcd_bus_suspend (bus); - - if (status != 0) { - dev_dbg(&hdev->dev, "'global' suspend %d\n", - status); - return status; - } - } else - return -EOPNOTSUPP; + status = hcd_bus_suspend(hdev->bus); + if (status != 0) { + dev_dbg(&hdev->dev, "'global' suspend %d\n", status); + hub_activate(hub); + } } - - /* stop khubd and related activity */ - hub_quiesce(hub); - return 0; + return status; } static int hub_resume(struct usb_interface *intf)