[IrDA]: Fix Rx/Tx path race.

From: G. Liakhovetski <gl@dsa-ac.de>

We need to switch to NRM _before_ sending the final packet otherwise
we might hit a race condition where we get the first packet from the
peer while we're still in LAP_XMIT_P.

Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/irda/irlap_frame.c b/net/irda/irlap_frame.c
index 3c5a68e3641..3013c49ab97 100644
--- a/net/irda/irlap_frame.c
+++ b/net/irda/irlap_frame.c
@@ -798,16 +798,19 @@ void irlap_send_data_primary_poll(struct irlap_cb *self, struct sk_buff *skb)
                 self->vs = (self->vs + 1) % 8;
                 self->ack_required = FALSE;
 
+                irlap_next_state(self, LAP_NRM_P);
                 irlap_send_i_frame(self, tx_skb, CMD_FRAME);
         } else {
                 IRDA_DEBUG(4, "%s(), sending unreliable frame\n", __FUNCTION__);
 
                 if (self->ack_required) {
                         irlap_send_ui_frame(self, skb_get(skb), self->caddr, CMD_FRAME);
+                        irlap_next_state(self, LAP_NRM_P);
                         irlap_send_rr_frame(self, CMD_FRAME);
                         self->ack_required = FALSE;
                 } else {
                         skb->data[1] |= PF_BIT;
+                        irlap_next_state(self, LAP_NRM_P);
                         irlap_send_ui_frame(self, skb_get(skb), self->caddr, CMD_FRAME);
                 }
         }