During suspend and resume, other CPUs are hot-unpluged and IRQs are migrated to CPU0. So it is not necessary to restore irq affinity for eiointc irq controller. Also there is some optimization for the interrupt dispatch function eiointc_irq_dispatch. There are 256 IRQs supported for eiointc, eiointc irq handler reads the bitmap and find pending irqs when irq happens. So there are four times of consecutive iocsr_read64 operations for the total 256 bits to find all pending irqs. If the pending bitmap is zero, it means that there is no pending irq for the this irq bitmap range, we can skip handling to avoid some useless operations such as clearing hw ISR. --- Changes in v3: Split the patch into three small patches Changes in v2: Modify changelog and comments --- Bibo Mao (3): irqchip/loongson-eiointc: Skip handling if there is no pending irq irqchip/loongson-eiointc: Refine irq affinity setting during resume irqchip/loongson-eiointc: Typo fix in function eiointc_domain_alloc drivers/irqchip/irq-loongson-eiointc.c | 29 +++++++++++--------------- 1 file changed, 12 insertions(+), 17 deletions(-) base-commit: 052d534373b7ed33712a63d5e17b2b6cdbce84fd -- 2.39.3
