Hello, recently I was doing a lot of tracing/profiling to understand
an issue we were having. Anyway, during this I ran across
__napi_schedule_irqoff() where the comment in dev.c says "Variant of
__napi_schedule() assuming hard irqs are masked".
It looks like the queue_writel(queue, IDR, bp->rx_intr_mask); call
just before the __napi_schedule() call in macb_main.c is doing this
hard irq masking? So could it change to be like this?
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -1616,7 +1623,7 @@ static irqreturn_t macb_interrupt(int irq, void *dev_id)
if (napi_schedule_prep(&queue->napi)) {
netdev_vdbg(bp->dev, "scheduling RX softirq\n");
- __napi_schedule(&queue->napi);
+ __napi_schedule_irqoff(&queue->napi);
}
}
-Paul
