Patch "usb: xhci: Return error when host is dead in xhci_disable_slot()" has been added to the 4.14-stable tree

Patch "usb: xhci: Return error when host is dead in xhci_disable_slot()" has been added to the 4.14-stable tree

[gregkh]

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

    usb: xhci: Return error when host is dead in xhci_disable_slot()

to the 4.14-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-xhci-return-error-when-host-is-dead-in-xhci_disable_slot.patch
and it can be found in the queue-4.14 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 foo@baz Wed Dec  6 18:04:41 CET 2017
From: Lu Baolu <baolu.lu@linux.intel.com>
Date: Thu, 5 Oct 2017 11:21:43 +0300
Subject: usb: xhci: Return error when host is dead in xhci_disable_slot()

From: Lu Baolu <baolu.lu@linux.intel.com>


[ Upstream commit dcabc76fa9361186e6b88c30a68db8fa9d5b4a1c ]

xhci_disable_slot() is a helper for disabling a slot when a device
goes away or recovers from error situations. Currently, it returns
success when it sees a dead host. This is not the right way to go.
It should return error and let the invoker know that disable slot
command was failed due to a dead host.

Fixes: f9e609b82479 ("usb: xhci: Add helper function xhci_disable_slot().")
Cc: Guoqing Zhang <guoqing.zhang@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/xhci.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -3583,10 +3583,9 @@ int xhci_disable_slot(struct xhci_hcd *x
 	state = readl(&xhci->op_regs->status);
 	if (state == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING) ||
 			(xhci->xhc_state & XHCI_STATE_HALTED)) {
-		xhci_free_virt_device(xhci, slot_id);
 		spin_unlock_irqrestore(&xhci->lock, flags);
 		kfree(command);
-		return ret;
+		return -ENODEV;
 	}
 
 	ret = xhci_queue_slot_control(xhci, command, TRB_DISABLE_SLOT,


Patches currently in stable-queue which might be from baolu.lu@linux.intel.com are

queue-4.14/usb-xhci-return-error-when-host-is-dead-in-xhci_disable_slot.patch
queue-4.14/usb-serial-usb_debug-add-new-usb-device-id.patch