plip: use netif_rx_ni() for packet receive

netif_rx is meant to be called from interrupts because it doesn't wake
up ksoftirqd.  For calling from outside interrupts, netif_rx_ni exists.

This fixes plip to use netif_rx_ni.  It fixes the infamous error "NOHZ:
local_softirq_panding 08" that happens on some machines with NOHZ and
plip --- it is caused by the fact that softirq is pending and ksoftirqd
is sleeping.

Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/net/plip.c b/drivers/net/plip.c
index 5071fcd8a0bd18a08cc21b4b7e48a625a971017e..baf2cbfc886347fbd144b5cc86fa0fc3ad71d89f 100644 (file)
--- a/drivers/net/plip.c
+++ b/drivers/net/plip.c
@@ -663,7 +663,7 @@ plip_receive_packet(struct net_device *dev, struct net_local *nl,
        case PLIP_PK_DONE:
                /* Inform the upper layer for the arrival of a packet. */
                rcv->skb->protocol=plip_type_trans(rcv->skb, dev);
-               netif_rx(rcv->skb);
+               netif_rx_ni(rcv->skb);
                dev->last_rx = jiffies;
                dev->stats.rx_bytes += rcv->length.h;
                dev->stats.rx_packets++;