x86/irq: Make irq activate operations symmetric

The recent commit which prevents double activation of interrupts unearthed
interesting code in x86. The code (ab)uses irq_domain_activate_irq() to
reconfigure an already activated interrupt. That trips over the prevention
code now.

Fix it by deactivating the interrupt before activating the new configuration.

Fixes: 08d85f3ea99f1 "irqdomain: Avoid activating interrupts more than once"
Reported-and-tested-by: Mike Galbraith <efault@gmx.de>
Reported-and-tested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701311901580.3457@nanos

path: root/drivers/usb/host/xhci-plat.h

/*
 * xhci-plat.h - xHCI host controller driver platform Bus Glue.
 *
 * Copyright (C) 2015 Renesas Electronics Corporation
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 */

#ifndef _XHCI_PLAT_H
#define _XHCI_PLAT_H

#include "xhci.h"	/* for hcd_to_xhci() */

struct xhci_plat_priv {
	const char *firmware_name;
	void (*plat_start)(struct usb_hcd *);
	int (*init_quirk)(struct usb_hcd *);
};

#define hcd_to_xhci_priv(h) ((struct xhci_plat_priv *)hcd_to_xhci(h)->priv)
#endif	/* _XHCI_PLAT_H */