diff options
Diffstat (limited to 'drivers/xen/events.c')
| -rw-r--r-- | drivers/xen/events.c | 26 |
1 files changed, 7 insertions, 19 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 0541e07d4f67..459121c53251 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -54,7 +54,7 @@ static DEFINE_PER_CPU(int, ipi_to_irq[XEN_NR_IPIS]) = {[0 ... XEN_NR_IPIS-1] = - /* Interrupt types. */ enum xen_irq_type { - IRQT_UNBOUND, + IRQT_UNBOUND = 0, IRQT_PIRQ, IRQT_VIRQ, IRQT_IPI, @@ -102,9 +102,6 @@ static inline unsigned long *cpu_evtchn_mask(int cpu) return cpu_evtchn_mask_p[cpu].bits; } -/* Reference counts for bindings to IRQs. */ -static int irq_bindcount[NR_IRQS]; - /* Xen will never allocate port zero for any purpose. */ #define VALID_EVTCHN(chn) ((chn) != 0) @@ -330,9 +327,8 @@ static int find_unbound_irq(void) int irq; struct irq_desc *desc; - /* Only allocate from dynirq range */ for (irq = 0; irq < nr_irqs; irq++) - if (irq_bindcount[irq] == 0) + if (irq_info[irq].type == IRQT_UNBOUND) break; if (irq == nr_irqs) @@ -365,8 +361,6 @@ int bind_evtchn_to_irq(unsigned int evtchn) irq_info[irq] = mk_evtchn_info(evtchn); } - irq_bindcount[irq]++; - spin_unlock(&irq_mapping_update_lock); return irq; @@ -403,8 +397,6 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu) bind_evtchn_to_cpu(evtchn, cpu); } - irq_bindcount[irq]++; - out: spin_unlock(&irq_mapping_update_lock); return irq; @@ -441,8 +433,6 @@ static int bind_virq_to_irq(unsigned int virq, unsigned int cpu) bind_evtchn_to_cpu(evtchn, cpu); } - irq_bindcount[irq]++; - spin_unlock(&irq_mapping_update_lock); return irq; @@ -455,7 +445,7 @@ static void unbind_from_irq(unsigned int irq) spin_lock(&irq_mapping_update_lock); - if ((--irq_bindcount[irq] == 0) && VALID_EVTCHN(evtchn)) { + if (VALID_EVTCHN(evtchn)) { close.port = evtchn; if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close) != 0) BUG(); @@ -681,6 +671,8 @@ out: /* Rebind a new event channel to an existing irq. */ void rebind_evtchn_irq(int evtchn, int irq) { + struct irq_info *info = info_for_irq(irq); + /* Make sure the irq is masked, since the new event channel will also be masked. */ disable_irq(irq); @@ -690,8 +682,8 @@ void rebind_evtchn_irq(int evtchn, int irq) /* After resume the irq<->evtchn mappings are all cleared out */ BUG_ON(evtchn_to_irq[evtchn] != -1); /* Expect irq to have been bound before, - so the bindcount should be non-0 */ - BUG_ON(irq_bindcount[irq] == 0); + so there should be a proper type */ + BUG_ON(info->type == IRQT_UNBOUND); evtchn_to_irq[evtchn] = irq; irq_info[irq] = mk_evtchn_info(evtchn); @@ -948,9 +940,5 @@ void __init xen_init_IRQ(void) for (i = 0; i < NR_EVENT_CHANNELS; i++) mask_evtchn(i); - /* Dynamic IRQ space is currently unbound. Zero the refcnts. */ - for (i = 0; i < nr_irqs; i++) - irq_bindcount[i] = 0; - irq_ctx_init(smp_processor_id()); } |