Patch "USB: UHCI: report non-PME wakeup signalling for Intel hardware" has been added to the 4.4-stable tree

Patch "USB: UHCI: report non-PME wakeup signalling for Intel hardware" has been added to the 4.4-stable tree

[gregkh]

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

    USB: UHCI: report non-PME wakeup signalling for Intel hardware

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-uhci-report-non-pme-wakeup-signalling-for-intel-hardware.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From ccdb6be9ec6580ef69f68949ebe26e0fb58a6fb0 Mon Sep 17 00:00:00 2001
From: Alan Stern <stern@rowland.harvard.edu>
Date: Fri, 21 Oct 2016 16:49:07 -0400
Subject: USB: UHCI: report non-PME wakeup signalling for Intel hardware

From: Alan Stern <stern@rowland.harvard.edu>

commit ccdb6be9ec6580ef69f68949ebe26e0fb58a6fb0 upstream.

The UHCI controllers in Intel chipsets rely on a platform-specific non-PME
mechanism for wakeup signalling.  They can generate wakeup signals even
though they don't support PME.

We need to let the USB core know this so that it will enable runtime
suspend for UHCI controllers.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/host/uhci-pci.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/usb/host/uhci-pci.c
+++ b/drivers/usb/host/uhci-pci.c
@@ -129,6 +129,10 @@ static int uhci_pci_init(struct usb_hcd
 	if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_HP)
 		uhci->wait_for_hp = 1;
 
+	/* Intel controllers use non-PME wakeup signalling */
+	if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_INTEL)
+		device_set_run_wake(uhci_dev(uhci), 1);
+
 	/* Set up pointers to PCI-specific functions */
 	uhci->reset_hc = uhci_pci_reset_hc;
 	uhci->check_and_reset_hc = uhci_pci_check_and_reset_hc;


Patches currently in stable-queue which might be from stern@rowland.harvard.edu are

queue-4.4/usb-uhci-report-non-pme-wakeup-signalling-for-intel-hardware.patch
queue-4.4/usb-hub-fix-auto-remount-of-safely-removed-or-ejected-usb-3-devices.patch