New upstream version 16.11.5

[deb_dpdk.git] / lib / librte_mbuf / rte_mbuf.h

diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index ead7c6e..bc015d0 100644 (file)
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -1060,6 +1060,7 @@ static inline struct rte_mbuf *rte_pktmbuf_alloc(struct rte_mempool *mp)
  *    Array size
  *  @return
  *   - 0: Success
+ *   - -ENOENT: Not enough entries in the mempool; no mbufs are retrieved.
  */
 static inline int rte_pktmbuf_alloc_bulk(struct rte_mempool *pool,
         struct rte_mbuf **mbufs, unsigned count)
@@ -1232,13 +1233,14 @@ rte_pktmbuf_free_seg(struct rte_mbuf *m)
  * segment is added back into its original mempool.
  *
  * @param m
- *   The packet mbuf to be freed.
+ *   The packet mbuf to be freed. If NULL, the function does nothing.
  */
 static inline void rte_pktmbuf_free(struct rte_mbuf *m)
 {
        struct rte_mbuf *m_next;
 
-       __rte_mbuf_sanity_check(m, 1);
+       if (m != NULL)
+               __rte_mbuf_sanity_check(m, 1);
 
        while (m != NULL) {
                m_next = m->next;
@@ -1331,7 +1333,7 @@ static inline void rte_pktmbuf_refcnt_update(struct rte_mbuf *m, int16_t v)
  */
 static inline uint16_t rte_pktmbuf_headroom(const struct rte_mbuf *m)
 {
-       __rte_mbuf_sanity_check(m, 1);
+       __rte_mbuf_sanity_check(m, 0);
        return m->data_off;
 }
 
@@ -1345,7 +1347,7 @@ static inline uint16_t rte_pktmbuf_headroom(const struct rte_mbuf *m)
  */
 static inline uint16_t rte_pktmbuf_tailroom(const struct rte_mbuf *m)
 {
-       __rte_mbuf_sanity_check(m, 1);
+       __rte_mbuf_sanity_check(m, 0);
        return (uint16_t)(m->buf_len - rte_pktmbuf_headroom(m) -
                          m->data_len);
 }
@@ -1360,12 +1362,10 @@ static inline uint16_t rte_pktmbuf_tailroom(const struct rte_mbuf *m)
  */
 static inline struct rte_mbuf *rte_pktmbuf_lastseg(struct rte_mbuf *m)
 {
-       struct rte_mbuf *m2 = (struct rte_mbuf *)m;
-
        __rte_mbuf_sanity_check(m, 1);
-       while (m2->next != NULL)
-               m2 = m2->next;
-       return m2;
+       while (m->next != NULL)
+               m = m->next;
+       return m;
 }
 
 /**