linux-kernel - [PATCH 4.17 54/70] x86/ioapic: Use apic_ack

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Date:   Sun, 24 Jun 2018 23:22:46 +0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Song Liu <songliubraving@...com>,
        Joerg Roedel <jroedel@...e.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Song Liu <liu.song.a23@...il.com>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Mike Travis <mike.travis@....com>,
        Borislav Petkov <bp@...en8.de>,
        Tariq Toukan <tariqt@...lanox.com>
Subject: [PATCH 4.17 54/70] x86/ioapic: Use apic_ack_irq()

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

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

From: Thomas Gleixner <tglx@...utronix.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 <tglx@...utronix.de>
Tested-by: Song Liu <songliubraving@...com>
Cc: Joerg Roedel <jroedel@...e.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Song Liu <liu.song.a23@...il.com>
Cc: Dmitry Safonov <0x7f454c46@...il.com>
Cc: stable@...r.kernel.org
Cc: Mike Travis <mike.travis@....com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Tariq Toukan <tariqt@...lanox.com>
Link: https://lkml.kernel.org/r/20180604162224.639011135@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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
@@ -1851,7 +1851,7 @@ 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);
 }