svn commit: r255304 - head/sys/cam/scsi

[Alexander Motin]

Author: mav
Date: Fri Sep  6 14:31:52 2013
New Revision: 255304
URL: http://svnweb.freebsd.org/changeset/base/255304

Log:
  Fix kernel panic if cache->nelms is zero.
  
  MFC after:	2 weeks

Modified:
  head/sys/cam/scsi/scsi_enc_ses.c

Modified: head/sys/cam/scsi/scsi_enc_ses.c
==============================================================================
--- head/sys/cam/scsi/scsi_enc_ses.c	Fri Sep  6 13:47:16 2013	(r255303)
+++ head/sys/cam/scsi/scsi_enc_ses.c	Fri Sep  6 14:31:52 2013	(r255304)
@@ -567,8 +567,8 @@ ses_cache_free_elm_addlstatus(enc_softc_
 		return;
 
 	for (cur_elm = cache->elm_map,
-	     last_elm = &cache->elm_map[cache->nelms - 1];
-	     cur_elm <= last_elm; cur_elm++) {
+	     last_elm = &cache->elm_map[cache->nelms];
+	     cur_elm != last_elm; cur_elm++) {
 		ses_element_t *elmpriv;
 
 		elmpriv = cur_elm->elm_private;
@@ -598,8 +598,8 @@ ses_cache_free_elm_descs(enc_softc_t *en
 		return;
 
 	for (cur_elm = cache->elm_map,
-	     last_elm = &cache->elm_map[cache->nelms - 1];
-	     cur_elm <= last_elm; cur_elm++) {
+	     last_elm = &cache->elm_map[cache->nelms];
+	     cur_elm != last_elm; cur_elm++) {
 		ses_element_t *elmpriv;
 
 		elmpriv = cur_elm->elm_private;
@@ -644,8 +644,8 @@ ses_cache_free_elm_map(enc_softc_t *enc,
 	ses_cache_free_elm_descs(enc, cache);
 	ses_cache_free_elm_addlstatus(enc, cache);
 	for (cur_elm = cache->elm_map,
-	     last_elm = &cache->elm_map[cache->nelms - 1];
-	     cur_elm <= last_elm; cur_elm++) {
+	     last_elm = &cache->elm_map[cache->nelms];
+	     cur_elm != last_elm; cur_elm++) {
 
 		ENC_FREE_AND_NULL(cur_elm->elm_private);
 	}
@@ -717,8 +717,8 @@ ses_cache_clone(enc_softc_t *enc, enc_ca
 	dst->elm_map = ENC_MALLOCZ(dst->nelms * sizeof(enc_element_t));
 	memcpy(dst->elm_map, src->elm_map, dst->nelms * sizeof(enc_element_t));
 	for (dst_elm = dst->elm_map, src_elm = src->elm_map,
-	     last_elm = &src->elm_map[src->nelms - 1];
-	     src_elm <= last_elm; src_elm++, dst_elm++) {
+	     last_elm = &src->elm_map[src->nelms];
+	     src_elm != last_elm; src_elm++, dst_elm++) {
 
 		dst_elm->elm_private = ENC_MALLOCZ(sizeof(ses_element_t));
 		memcpy(dst_elm->elm_private, src_elm->elm_private,