From: Jacob Pan Date: Fri, 14 Jan 2011 00:06:44 +0000 (-0800) Subject: x86, mrst: Set correct APB timer IRQ affinity for secondary cpu X-Git-Tag: v2.6.38-rc1~3^2~3 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6550904ddbc3c286798a87edf95eeebcc62bc58a;p=platform%2Fupstream%2Fkernel-adaptation-pc.git x86, mrst: Set correct APB timer IRQ affinity for secondary cpu 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 LKML-Reference: <1294963604-18111-1-git-send-email-jacob.jun.pan@linux.intel.com> Signed-off-by: H. Peter Anvin Cc: 2.6.37 --- diff --git a/arch/x86/kernel/apb_timer.c b/arch/x86/kernel/apb_timer.c index 7c9ab59..51ef31a 100644 --- a/arch/x86/kernel/apb_timer.c +++ b/arch/x86/kernel/apb_timer.c @@ -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); }