Hi, I'm just trying to understand how he things would look like, if the device sends an interrupt (edge-triggered) while a driver has issued one of the above mentioned APIs (to disable the interrupts temporarily). A) local_irq_disable(): As far as I understand, this API disables the interrupt by operating at the local CPU registers (disabling the global interrupt enable bit for THIS CPU). The interrupt is still enabled at the interrupt controller level. Assuming that the interrupts are configured such that only THIS CPU receives all the interrupts, what would happen in this situation if the device sends an interrupt? Will it be noticed / acknowledged? When the driver re-enables the interrupts via local_irq_enable()? B) disable_irq(): I think this disables the interrupt by disabling the specific interrupt at the interrupt controller level (Thus for all CPUs). Any interrupt triggered during this time will be lost, right? Thanks, Rajat -- To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs
