timer: fix pending-list manipulation

This commit fixes incorrect pending-list manipulation
when getting list of expired timers in rte_timer_manage().

When timer_get_prev_entries() sets pending_head on prev,
the pending-list is broken.
The next of pending_head always becomes NULL.
In this depth level, it is not need to manipulate the list.

Fixes: 9b15ba895b9f ("timer: use a skip list")

Signed-off-by: Hiroyuki Mikita <h.mikita89@gmail.com>
Acked-by: Robert Sanford <rsanford@akamai.com>

diff --git a/lib/librte_timer/rte_timer.c b/lib/librte_timer/rte_timer.c
index 3dcdab5..7457d32 100644 (file)
--- a/lib/librte_timer/rte_timer.c
+++ b/lib/librte_timer/rte_timer.c
@@ -543,6 +543,8 @@ void rte_timer_manage(void)
        /* break the existing list at current time point */
        timer_get_prev_entries(cur_time, lcore_id, prev);
        for (i = priv_timer[lcore_id].curr_skiplist_depth -1; i >= 0; i--) {
+               if (prev[i] == &priv_timer[lcore_id].pending_head)
+                       continue;
                priv_timer[lcore_id].pending_head.sl_next[i] =
                    prev[i]->sl_next[i];
                if (prev[i]->sl_next[i] == NULL)