[PATCH v2] crypto/ipsec_mb: enqueue counter fix

[Saoirse O'Donovan <saoirse.odonovan@intel.com>]

This patch removes enqueue op counter update from the process_op_bit
function where the process is now done in dequeue stage. The original
stats increment was incorrect as they shouldn't have been updated at all
in this function.

Fixes: 4f1cfda59ad3 ("crypto/ipsec_mb: move snow3g PMD")
Cc: piotrx.bronowski@intel.com
Cc: stable@dpdk.org

Signed-off-by: Saoirse O'Donovan <saoirse.odonovan@intel.com>

---
v2: Added cc stable for 21.11 and 22.11 backport.

A similar fix has been sent to 20.11 LTS stable, in the interest of
time. In that fix, the enqueued stat is still in use, therefore only the
fix to the count increment was necessary.

Here is the mail archive link:
https://mails.dpdk.org/archives/stable/2023-April/043550.html
---
 drivers/crypto/ipsec_mb/pmd_snow3g.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/crypto/ipsec_mb/pmd_snow3g.c b/drivers/crypto/ipsec_mb/pmd_snow3g.c
index 8ed069f428..e64df1a462 100644
--- a/drivers/crypto/ipsec_mb/pmd_snow3g.c
+++ b/drivers/crypto/ipsec_mb/pmd_snow3g.c
@@ -372,9 +372,10 @@ process_ops(struct rte_crypto_op **ops, struct snow3g_session *session,
 /** Process a crypto op with length/offset in bits. */
 static int
 process_op_bit(struct rte_crypto_op *op, struct snow3g_session *session,
-		struct ipsec_mb_qp *qp, uint16_t *accumulated_enqueued_ops)
+		struct ipsec_mb_qp *qp)
 {
-	uint32_t enqueued_op, processed_op;
+	unsigned int processed_op;
+	int ret;
 
 	switch (session->op) {
 	case IPSEC_MB_OP_ENCRYPT_ONLY:
@@ -421,9 +422,10 @@ process_op_bit(struct rte_crypto_op *op, struct snow3g_session *session,
 
 	if (unlikely(processed_op != 1))
 		return 0;
-	enqueued_op = rte_ring_enqueue(qp->ingress_queue, op);
-	qp->stats.enqueued_count += enqueued_op;
-	*accumulated_enqueued_ops += enqueued_op;
+
+	ret = rte_ring_enqueue(qp->ingress_queue, op);
+	if (ret != 0)
+		return ret;
 
 	return 1;
 }
@@ -439,7 +441,6 @@ snow3g_pmd_dequeue_burst(void *queue_pair,
 	struct snow3g_session *prev_sess = NULL, *curr_sess = NULL;
 	uint32_t i;
 	uint8_t burst_size = 0;
-	uint16_t enqueued_ops = 0;
 	uint8_t processed_ops;
 	uint32_t nb_dequeued;
 
@@ -479,8 +480,7 @@ snow3g_pmd_dequeue_burst(void *queue_pair,
 				prev_sess = NULL;
 			}
 
-			processed_ops = process_op_bit(curr_c_op, curr_sess,
-							qp, &enqueued_ops);
+			processed_ops = process_op_bit(curr_c_op, curr_sess, qp);
 			if (processed_ops != 1)
 				break;
 
-- 
2.25.1