[NETPOLL]: rx_flags bugfix

Initialize npinfo->rx_flags.  The way it stands now, this will have random
garbage, and so will incur a locking penalty even when an rx_hook isn't
registered and we are not active in the netpoll polling code.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index c327c9edadc5..895f3efc65aa 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -639,6 +639,7 @@ int netpoll_setup(struct netpoll *np)
                 if (!npinfo)
                         goto release;
 
+                npinfo->rx_flags = 0;
                 npinfo->rx_np = NULL;
                 npinfo->poll_lock = SPIN_LOCK_UNLOCKED;
                 npinfo->poll_owner = -1;