4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thomas Gleixner <t...@linutronix.de>

commit 2b04e46d8d0b9b7ac08ded672e3eab823f01d77a upstream.

To address the EBUSY fail of interrupt affinity settings in case that the
previous setting has not been cleaned up yet, use the new apic_ack_irq()
function instead of directly invoking ack_APIC_irq().

Preparatory change for the real fix

Fixes: dccfe3147b42 ("x86/vector: Simplify vector move cleanup")
Signed-off-by: Thomas Gleixner <t...@linutronix.de>
Tested-by: Song Liu <songliubrav...@fb.com>
Cc: Joerg Roedel <jroe...@suse.de>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Song Liu <liu.song....@gmail.com>
Cc: Dmitry Safonov <0x7f454...@gmail.com>
Cc: sta...@vger.kernel.org
Cc: Mike Travis <mike.tra...@hpe.com>
Cc: Borislav Petkov <b...@alien8.de>
Cc: Tariq Toukan <tar...@mellanox.com>
Link: https://lkml.kernel.org/r/20180604162224.639011...@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 arch/x86/kernel/apic/io_apic.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1859,7 +1859,7 @@ static void ioapic_ir_ack_level(struct i
         * intr-remapping table entry. Hence for the io-apic
         * EOI we use the pin number.
         */
-       ack_APIC_irq();
+       apic_ack_irq(irq_data);
        eoi_ioapic_pin(data->entry.vector, data);
 }
 


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