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From: Michael Tuexen <tuexen@FreeBSD.org>
Date: Wed, 15 Sep 2010 21:53:10 +0000 (UTC)
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Subject: svn commit: r212711 - head/sys/netinet
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Author: tuexen
Date: Wed Sep 15 21:53:10 2010
New Revision: 212711
URL: http://svn.freebsd.org/changeset/base/212711

Log:
  Use TAILQ_EMPTY() for testing if a tail queue is empty.
  Set whoFrom to NULL after freeing whoFrom.

Modified:
  head/sys/netinet/sctp_indata.c

Modified: head/sys/netinet/sctp_indata.c
==============================================================================
--- head/sys/netinet/sctp_indata.c	Wed Sep 15 21:50:37 2010	(r212710)
+++ head/sys/netinet/sctp_indata.c	Wed Sep 15 21:53:10 2010	(r212711)
@@ -708,9 +708,10 @@ protocol_error:
 					control->data = NULL;
 					asoc->size_on_all_streams -= control->length;
 					sctp_ucount_decr(asoc->cnt_on_all_streams);
-					if (control->whoFrom)
+					if (control->whoFrom) {
 						sctp_free_remote_addr(control->whoFrom);
-					control->whoFrom = NULL;
+						control->whoFrom = NULL;
+					}
 					sctp_free_a_readq(stcb, control);
 					return;
 				} else {
@@ -4845,7 +4846,7 @@ sctp_handle_sack(struct mbuf *m, int off
 			if (asoc->pr_sctp_cnt != 0)
 				asoc->pr_sctp_cnt--;
 		}
-		if ((TAILQ_FIRST(&asoc->sent_queue) == NULL) &&
+		if (TAILQ_EMPTY(&asoc->sent_queue) &&
 		    (asoc->total_flight > 0)) {
 #ifdef INVARIANTS
 			panic("Warning flight size is postive and should be 0");
@@ -5818,7 +5819,7 @@ sctp_handle_forward_tsn(struct sctp_tcb 
 	 */
 	sctp_slide_mapping_arrays(stcb);
 
-	if (TAILQ_FIRST(&asoc->reasmqueue)) {
+	if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
 		/* now lets kick out and check for more fragmented delivery */
 		/* sa_ignore NO_NULL_CHK */
 		sctp_deliver_reasm_check(stcb, &stcb->asoc);