netpoll: fix race on poll_list resulting in garbage entry

[h-e-n] / net / core / netpoll.c

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 6c7af39..dadac62 100644 (file)
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -133,9 +133,11 @@ static int poll_one_napi(struct netpoll_info *npinfo,
 
        npinfo->rx_flags |= NETPOLL_RX_DROP;
        atomic_inc(&trapped);
+       set_bit(NAPI_STATE_NPSVC, &napi->state);
 
        work = napi->poll(napi, budget);
 
+       clear_bit(NAPI_STATE_NPSVC, &napi->state);
        atomic_dec(&trapped);
        npinfo->rx_flags &= ~NETPOLL_RX_DROP;