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x86, mrst: Set correct APB timer IRQ affinity for secondary cpu

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Offlining the secondary CPU causes the timer irq affinity to be set to
CPU 0. When the secondary CPU is back online again, the wrong irq
affinity will be used.

This patch ensures secondary per CPU timer always has the correct
IRQ affinity when enabled.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
LKML-Reference: <1294963604-18111-1-git-send-email-jacob.jun.pan@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@kernel.org> 2.6.37
This commit is contained in:
Jacob Pan 2011-01-13 16:06:44 -08:00 committed by H. Peter Anvin
parent 62627bec8a
commit 6550904ddb
1 changed files with 8 additions and 6 deletions
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14
arch/x86/kernel/apb_timer.c
View file

@ -313,14 +313,16 @@ static void apbt_setup_irq(struct apbt_dev *adev)
if (adev->irq == 0)
return;
irq_modify_status(adev->irq, 0, IRQ_MOVE_PCNTXT);
irq_set_affinity(adev->irq, cpumask_of(adev->cpu));
/* APB timer irqs are set up as mp_irqs, timer is edge type */
__set_irq_handler(adev->irq, handle_edge_irq, 0, "edge");
if (system_state == SYSTEM_BOOTING) {
irq_modify_status(adev->irq, 0, IRQ_MOVE_PCNTXT);
irq_set_affinity(adev->irq, cpumask_of(adev->cpu));
/* APB timer irqs are set up as mp_irqs, timer is edge type */
__set_irq_handler(adev->irq, handle_edge_irq, 0, "edge");
if (request_irq(adev->irq, apbt_interrupt_handler,
IRQF_TIMER | IRQF_DISABLED | IRQF_NOBALANCING,
adev->name, adev)) {
IRQF_TIMER | IRQF_DISABLED |
IRQF_NOBALANCING,
adev->name, adev)) {
printk(KERN_ERR "Failed request IRQ for APBT%d\n",
adev->num);
}