Hi, On 20/07/2016 10:12, Thomas Gleixner wrote: > On Tue, 19 Jul 2016, Eric Auger wrote: >> +bool msi_doorbell_safe(void) >> +{ >> + struct irqchip_doorbell *db; >> + bool irq_remapping = true; >> + >> + mutex_lock(&irqchip_doorbell_mutex); >> + list_for_each_entry(db, &irqchip_doorbell_list, next) { >> + irq_remapping &= db->info.irq_remapping; > > db->info.irq_remapping is set in msi_doorbell_register(). So you can keep book > about that there. No need to iterate here. Yes makes sense to store the info at registration time. Currently this function is not in any fast path but that's cleaner from a general perspective. I will need to do such iteration at un-registration though.
Thanks Eric > > Thanks, > > tglx > > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu