From: Linus Torvalds Date: Thu, 9 Feb 2017 02:08:29 +0000 (-0800) Subject: Revert "x86/ioapic: Restore IO-APIC irq_chip retrigger callback" X-Git-Tag: v4.9.10~46 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d9985610c6bee5998db6d0b39d06cbbc5447e7e1;p=platform%2Fkernel%2Flinux-amlogic.git Revert "x86/ioapic: Restore IO-APIC irq_chip retrigger callback" commit d966564fcdc19e13eb6ba1fbe6b8101070339c3d upstream. This reverts commit 020eb3daaba2857b32c4cf4c82f503d6a00a67de. 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 Cc: Ruslan Ruslichenko Cc: Thomas Gleixner Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 7249f1500bcb..d1e25564b3c1 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1876,7 +1876,6 @@ static struct irq_chip ioapic_chip __read_mostly = { .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, }; @@ -1888,7 +1887,6 @@ static struct irq_chip ioapic_ir_chip __read_mostly = { .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, };