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| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-04-09 03:05:15 +0200 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-04-16 22:05:14 +0200 |
| commit | ef35a4e6d9eef3bd904b8c6b85618a2e878e801e (patch) | |
| tree | ebb98bf24a457a4c48325625777408319e55a913 /arch/x86/xen/time.c | |
| parent | xen/events: Check that IRQ value passed in is valid. (diff) | |
| download | linux-ef35a4e6d9eef3bd904b8c6b85618a2e878e801e.tar.xz linux-ef35a4e6d9eef3bd904b8c6b85618a2e878e801e.zip | |
xen/time: Add default value of -1 for IRQ and check for that.
If the timer interrupt has been de-init or is just now being
initialized, the default value of -1 should be preset as
interrupt line. Check for that and if something is odd
WARN us.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86/xen/time.c')
| -rw-r--r-- | arch/x86/xen/time.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c index 054cc01bb849..3d88bfdf9e1c 100644 --- a/arch/x86/xen/time.c +++ b/arch/x86/xen/time.c @@ -377,7 +377,7 @@ static const struct clock_event_device xen_vcpuop_clockevent = { static const struct clock_event_device *xen_clockevent = &xen_timerop_clockevent; -static DEFINE_PER_CPU(struct clock_event_device, xen_clock_events); +static DEFINE_PER_CPU(struct clock_event_device, xen_clock_events) = { .irq = -1 }; static irqreturn_t xen_timer_interrupt(int irq, void *dev_id) { @@ -401,6 +401,9 @@ void xen_setup_timer(int cpu) struct clock_event_device *evt; int irq; + evt = &per_cpu(xen_clock_events, cpu); + WARN(evt->irq >= 0, "IRQ%d for CPU%d is already allocated\n", evt->irq, cpu); + printk(KERN_INFO "installing Xen timer for CPU %d\n", cpu); name = kasprintf(GFP_KERNEL, "timer%d", cpu); @@ -413,7 +416,6 @@ void xen_setup_timer(int cpu) IRQF_FORCE_RESUME, name, NULL); - evt = &per_cpu(xen_clock_events, cpu); memcpy(evt, xen_clockevent, sizeof(*evt)); evt->cpumask = cpumask_of(cpu); @@ -426,6 +428,7 @@ void xen_teardown_timer(int cpu) BUG_ON(cpu == 0); evt = &per_cpu(xen_clock_events, cpu); unbind_from_irqhandler(evt->irq, NULL); + evt->irq = -1; } void xen_setup_cpu_clockevents(void) |