Thread unregister returns success while unregister not been performed.
This is due to incorrect thread registration status check.
Fix this issue by correcting bitmap check.
Fixes: 64994b56cfd7 ("rcu: add RCU library supporting QSBR mechanism")
Cc: sta...@dpdk.org
Signed-off-by: Ruifeng Wang <ruifeng.w...@arm.com>
Reviewed-by: Gavin Hu <gavin...@arm.com>
---
lib/librte_rcu/rte_rcu_qsbr.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/librte_rcu/rte_rcu_qsbr.c b/lib/librte_rcu/rte_rcu_qsbr.c
index ce7f93dd3..8c37c88cd 100644
--- a/lib/librte_rcu/rte_rcu_qsbr.c
+++ b/lib/librte_rcu/rte_rcu_qsbr.c
@@ -158,7 +158,7 @@ rte_rcu_qsbr_thread_unregister(struct rte_rcu_qsbr *v,
unsigned int thread_id)
/* Check if the thread is already unregistered */
old_bmap = __atomic_load_n(__RTE_QSBR_THRID_ARRAY_ELM(v, i),
__ATOMIC_RELAXED);
- if (old_bmap & ~(1UL << id))
+ if (!(old_bmap & (1UL << id)))
return 0;
do {
@@ -175,7 +175,7 @@ rte_rcu_qsbr_thread_unregister(struct rte_rcu_qsbr *v,
unsigned int thread_id)
if (success)
__atomic_fetch_sub(&v->num_threads,
1, __ATOMIC_RELAXED);
- else if (old_bmap & ~(1UL << id))
+ else if (!(old_bmap & (1UL << id)))
/* Someone else unregistered this thread.
* Counter should not be incremented.
*/
--
2.17.1
