patch usb-don-t-change-hc-power-state-for-a-freeze.patch added to gregkh-2.6 tree

[<gregkh@xxxxxxx>]

This is a note to let you know that I've just added the patch titled

     Subject: USB: don't change HC power state for a FREEZE

to my gregkh-2.6 tree.  Its filename is

     usb-don-t-change-hc-power-state-for-a-freeze.patch

This tree can be found at 
    http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/


>From stern@xxxxxxxxxxxxxxxxxxx  Mon Nov 26 22:51:16 2007
From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Date: Mon, 19 Nov 2007 15:57:45 -0500 (EST)
Subject: USB: don't change HC power state for a FREEZE
To: Greg KH <greg@xxxxxxxxx>
Cc: David Brownell <david-b@xxxxxxxxxxx>,  USB development list <linux-usb-devel@xxxxxxxxxxxxxxxxxxxxx>
Message-ID: <Pine.LNX.4.44L0.0711191556110.3443-100000@xxxxxxxxxxxxxxxxxxxx>


This patch (as1016) prevents PCI-based host controllers from
undergoing a power-state change during a FREEZE or a PRETHAW.  Such
changes are needed only during a SUSPEND.

Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
CC: David Brownell <david-b@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/usb/core/hcd-pci.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -250,6 +250,12 @@ int usb_hcd_pci_suspend (struct pci_dev 
 			pci_disable_device (dev);
 		}
 
+		if (message.event == PM_EVENT_FREEZE ||
+				message.event == PM_EVENT_PRETHAW) {
+			dev_dbg(hcd->self.controller, "--> no state change\n");
+			goto done;
+		}
+
 		if (!has_pci_pm) {
 			dev_dbg (hcd->self.controller, "--> PCI D0/legacy\n");
 			goto done;


Patches currently in gregkh-2.6 which might be from stern@xxxxxxxxxxxxxxxxxxx are

driver/pm-acquire-device-locks-prior-to-suspending.patch
driver/create-sys-...-power-when-config_pm-is-set.patch
driver/driver-core-fix-race-in-__device_release_driver.patch
usb/usb-add-support-for-an-older-firmware-revision-for-the-nikon-d200.patch
usb/usb-fix-priority-mistakes-in-drivers-usb-core-hub.c.patch
usb/usb-fix-signr-comment-in-usbdevice_fs.h.patch
usb/usb-mailing-lists-have-changed.patch
usb/usb-power-management-documenation-update.patch
usb/usb-hcd-avoid-duplicate-local_irq_disable.patch
usb/usb-usb-mon-mon_bin.c-cleanups.patch
usb/usb-keep-track-of-whether-interface-sysfs-files-exist.patch
usb/usb-uevent-environment-key-fix.patch
usb/usb-autosuspend-for-cdc-acm.patch
usb/usb-fix-up-ehci-startup-synchronization.patch
usb/usb-usb-storage-new-lockable-subclass-0x07.patch
usb/usb-don-t-change-hc-power-state-for-a-freeze.patch
usb/usb-dummy_hcd-don-t-register-drivers-on-the-platform-bus.patch
usb/usb-force-handover-port-to-companion-when-hub_port_connect_change-fails.patch
usb/usb-make-ksuspend_usbd-thread-non-freezable.patch
usb/usb-usb-storage-unusual_devs-entry-for-jetflash-ts1gjf2a.patch
usb/usb-storage-always-set-the-allow_restart-flag.patch

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