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Revert "x86/ioapic: Restore IO-APIC irq_chip retrigger callback"

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This reverts commit 020eb3daab.

Gabriel C reports that it causes his machine to not boot, and we haven't
tracked down the reason for it yet.  Since the bug it fixes has been
around for a longish time, we're better off reverting the fix for now.

Gabriel says:
 "It hangs early and freezes with a lot RCU warnings.

  I bisected it down to :

  > Ruslan Ruslichenko (1):
  >       x86/ioapic: Restore IO-APIC irq_chip retrigger callback

  Reverting this one fixes the problem for me..

  The box is a PRIMERGY TX200 S5 , 2 socket , 2 x E5520 CPU(s) installed"

and Ruslan and Thomas are currently stumped.

Reported-and-bisected-by: Gabriel C <nix.or.die@gmail.com>
Cc: Ruslan Ruslichenko <rruslich@cisco.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@kernel.org   # for the backport of the original commit
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2017-02-08 18:08:29 -08:00
parent 3b802c9455
commit d966564fcd
1 changed files with 0 additions and 2 deletions
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2
arch/x86/kernel/apic/io_apic.c
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@ -1875,7 +1875,6 @@ static struct irq_chip ioapic_chip __read_mostly = {
.irq_ack = irq_chip_ack_parent, .irq_ack = irq_chip_ack_parent,
.irq_eoi = ioapic_ack_level, .irq_eoi = ioapic_ack_level,
.irq_set_affinity = ioapic_set_affinity, .irq_set_affinity = ioapic_set_affinity,
.irq_retrigger = irq_chip_retrigger_hierarchy,
.flags = IRQCHIP_SKIP_SET_WAKE, .flags = IRQCHIP_SKIP_SET_WAKE,
}; };
@ -1887,7 +1886,6 @@ static struct irq_chip ioapic_ir_chip __read_mostly = {
.irq_ack = irq_chip_ack_parent, .irq_ack = irq_chip_ack_parent,
.irq_eoi = ioapic_ir_ack_level, .irq_eoi = ioapic_ir_ack_level,
.irq_set_affinity = ioapic_set_affinity, .irq_set_affinity = ioapic_set_affinity,
.irq_retrigger = irq_chip_retrigger_hierarchy,
.flags = IRQCHIP_SKIP_SET_WAKE, .flags = IRQCHIP_SKIP_SET_WAKE,
}; };