diff --git a/drivers/irqchip/irq-gic-common.c b/drivers/irqchip/irq-gic-common.c index f174ce0ca36115dc36feec5f047af7bf402e180a..ffff5a45f1e3008c7b96c1e4e4de39449dc8a93f 100644 --- a/drivers/irqchip/irq-gic-common.c +++ b/drivers/irqchip/irq-gic-common.c @@ -50,13 +50,17 @@ int gic_configure_irq(unsigned int irq, unsigned int type, else if (type & IRQ_TYPE_EDGE_BOTH) val |= confmask; + /* If the current configuration is the same, then we are done */ + if (val == oldval) + return 0; + /* * Write back the new configuration, and possibly re-enable - * the interrupt. If we tried to write a new configuration and failed, + * the interrupt. If we fail to write a new configuration, * return an error. */ writel_relaxed(val, base + GIC_DIST_CONFIG + confoff); - if (readl_relaxed(base + GIC_DIST_CONFIG + confoff) != val && val != oldval) + if (readl_relaxed(base + GIC_DIST_CONFIG + confoff) != val) ret = -EINVAL; if (sync_access)