net: napi_watchdog() can use napi_schedule_irqoff()

hrtimer handlers run with masked hard IRQ, we can therefore
use napi_schedule_irqoff()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index 05d19c6..304f2de 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5089,7 +5089,7 @@ static enum hrtimer_restart napi_watchdog(struct hrtimer *timer)
 
 	napi = container_of(timer, struct napi_struct, timer);
 	if (napi->gro_list)
-		napi_schedule(napi);
+		napi_schedule_irqoff(napi);
 
 	return HRTIMER_NORESTART;
 }