Commit 983bbf1a authored by Tian, Kevin's avatar Tian, Kevin Committed by Thomas Gleixner

x86: Don't unmask disabled irqs when migrating them

It doesn't make sense to unconditionally unmask a disabled irq when
migrating it from offlined cpu to another. If the irq triggers then it
will be disabled in the interrupt handler anyway. So we can just avoid
unmasking it.

[ tglx: Made masking unconditional again and fixed the changelog ]
Signed-off-by: default avatarFengzhe Zhang <fengzhe.zhang@intel.com>
Signed-off-by: default avatarKevin Tian <kevin.tian@intel.com>
Cc: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Jan Beulich <JBeulich@novell.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Link: http://lkml.kernel.org/r/%3C625BA99ED14B2D499DC4E29D8138F1505C8ED7F7E3%40shsmsx502.ccr.corp.intel.com%3ESigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent b87ba87c
...@@ -276,7 +276,8 @@ void fixup_irqs(void) ...@@ -276,7 +276,8 @@ void fixup_irqs(void)
else if (!(warned++)) else if (!(warned++))
set_affinity = 0; set_affinity = 0;
if (!irqd_can_move_in_process_context(data) && chip->irq_unmask) if (!irqd_can_move_in_process_context(data) &&
!irqd_irq_disabled(data) && chip->irq_unmask)
chip->irq_unmask(data); chip->irq_unmask(data);
raw_spin_unlock(&desc->lock); raw_spin_unlock(&desc->lock);
......
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