X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=net%2Firda%2Firlap_event.c;h=6af86eba7463259522b8530dfbf361e4624d464b;hb=ce2b7147bb83b7d729b17c1638f092a1bcba4981;hp=4c33bf5c8354df31023de03c679b7ee6b02b642f;hpb=37e58df30063e229ee5157f9d1c1fa1d749917c2;p=linux-2.6-omap-h63xx.git

diff --git a/net/irda/irlap_event.c b/net/irda/irlap_event.c
index 4c33bf5c835..6af86eba746 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
 		/*
@@ -1514,9 +1527,15 @@ static int irlap_state_nrm_p(struct irlap_cb *self, IRLAP_EVENT event,
 
 		/* N2 is the disconnect timer. Until we reach it, we retry */
 		if (self->retry_count < self->N2) {
-			/* Retry sending the pf bit to the secondary */
-			irlap_wait_min_turn_around(self, &self->qos_tx);
-			irlap_send_rr_frame(self, CMD_FRAME);
+			if (skb_peek(&self->wx_list) == NULL) {
+				/* Retry sending the pf bit to the secondary */
+				IRDA_DEBUG(4, "nrm_p: resending rr");
+				irlap_wait_min_turn_around(self, &self->qos_tx);
+				irlap_send_rr_frame(self, CMD_FRAME);
+			} else {
+				IRDA_DEBUG(4, "nrm_p: resend frames");
+				irlap_resend_rejected_frames(self, CMD_FRAME);
+			}
 
 			irlap_start_final_timer(self, self->final_timeout);
 			self->retry_count++;