[4.9,057/130] x86/ioapic: Restore IO-APIC irq_chip retrigger callback
diff mbox series

Message ID 20170124075537.268906860@linuxfoundation.org
State New, archived
Headers show
  • 4.9.6-stable review
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Commit Message

Greg Kroah-Hartman Jan. 24, 2017, 7:54 a.m. UTC
4.9-stable review patch.  If anyone has any objections, please let me know.


From: Ruslan Ruslichenko <rruslich@cisco.com>

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 ]

Fixes: d32932d02e18  ("x86/irq: Convert IOAPIC to use hierarchical irqdomain interfaces")
Signed-off-by: Ruslan Ruslichenko <rruslich@cisco.com>
Cc: xe-linux-external@cisco.com
Link: http://lkml.kernel.org/r/1484662432-13580-1-git-send-email-rruslich@cisco.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

diff mbox series

--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -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,
@@ -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,