Patch "x86/ioapic: Restore IO-APIC irq_chip retrigger callback" has been added to the 4.9-stable tree

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

x86/ioapic: Restore IO-APIC irq_chip retrigger callback

to the 4.9-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:
x86-ioapic-restore-io-apic-irq_chip-retrigger-callback.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Ruslan Ruslichenko <[email protected]>
Date: Tue, 17 Jan 2017 16:13:52 +0200
Subject: x86/ioapic: Restore IO-APIC irq_chip retrigger callback

From: Ruslan Ruslichenko <[email protected]>

commit 020eb3daaba2857b32c4cf4c82f503d6a00a67de upstream.

commit d32932d02e18 removed the irq_retrigger callback from the IO-APIC chip and did not add it to the new IO-APIC-IR irq chip.

Unfortunately the software resend fallback is not enabled on X86, so edge interrupts which are received during the lazy disabled state of the interrupt line are not retriggered and therefor lost.

Restore the callbacks.

[ tglx: Massaged changelog ]

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

@@ -1876,6 +1876,7 @@ static struct irq_chip ioapic_chip __rea
 	.irq_ack		= irq_chip_ack_parent,
 	.irq_eoi		= ioapic_ack_level,
 	.irq_set_affinity	= ioapic_set_affinity,
+	.irq_retrigger		= irq_chip_retrigger_hierarchy,
 	.flags			= IRQCHIP_SKIP_SET_WAKE,
 };
 

@@ -1887,6 +1888,7 @@ static struct irq_chip ioapic_ir_chip __
 	.irq_ack		= irq_chip_ack_parent,
 	.irq_eoi		= ioapic_ir_ack_level,
 	.irq_set_affinity	= ioapic_set_affinity,
+	.irq_retrigger		= irq_chip_retrigger_hierarchy,
 	.flags			= IRQCHIP_SKIP_SET_WAKE,
 };
 

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

queue-4.9/x86-ioapic-restore-io-apic-irq_chip-retrigger-callback.patch