Patch "xhci: don't dereference a xhci member after removing xhci" has been added to the 4.4-stable tree

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

xhci: don't dereference a xhci member after removing xhci

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:
xhci-don-t-dereference-a-xhci-member-after-removing-xhci.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 <[email protected]> know about it.

From: Mathias Nyman <[email protected]>
Date: Tue, 16 Aug 2016 10:18:06 +0300
Subject: xhci: don't dereference a xhci member after removing xhci

From: Mathias Nyman <[email protected]>

commit f1f6d9a8b540df22b87a5bf6bc104edaade81f47 upstream.

Remove the hcd after checking for the xhci last quirks, not before.

This caused a hang on a Alpine Ridge xhci based maching which remove the whole xhci controller when unplugging the last usb device

---
 drivers/usb/host/xhci-pci.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -311,11 +311,12 @@ static void xhci_pci_remove(struct pci_d
 		usb_remove_hcd(xhci->shared_hcd);
 		usb_put_hcd(xhci->shared_hcd);
 	}
-	usb_hcd_pci_remove(dev);
 
 	/* Workaround for spurious wakeups at shutdown with HSW */
 	if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
 		pci_set_power_state(dev, PCI_D3hot);
+
+	usb_hcd_pci_remove(dev);
 }
 
 #ifdef CONFIG_PM

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/xhci-don-t-dereference-a-xhci-member-after-removing-xhci.patch queue-4.4/usb-xhci-fix-panic-if-disconnect.patch queue-4.4/usb-define-usb_speed_super_plus-speed-for-superspeedplus-usb3.1-devices.patch queue-4.4/xhci-always-handle-command-ring-stopped-events.patch