diff options
Diffstat (limited to 'net/irda/irlap_event.c')
| -rw-r--r-- | net/irda/irlap_event.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/net/irda/irlap_event.c b/net/irda/irlap_event.c index 6d3aff862dc2..6af86eba7463 100644 --- a/net/irda/irlap_event.c +++ b/net/irda/irlap_event.c @@ -1199,6 +1199,19 @@ static int irlap_state_nrm_p(struct irlap_cb *self, IRLAP_EVENT event, switch (event) { case RECV_I_RSP: /* Optimize for the common case */ + if (unlikely(skb->len <= LAP_ADDR_HEADER + LAP_CTRL_HEADER)) { + /* + * Input validation check: a stir4200/mcp2150 + * combination sometimes results in an empty i:rsp. + * This makes no sense; we can just ignore the frame + * and send an rr:cmd immediately. This happens before + * changing nr or ns so triggers a retransmit + */ + irlap_wait_min_turn_around(self, &self->qos_tx); + irlap_send_rr_frame(self, CMD_FRAME); + /* Keep state */ + break; + } /* FIXME: must check for remote_busy below */ #ifdef CONFIG_IRDA_FAST_RR /* |