[PATCH v2 04/13] net/ionic: fix missing volatile type for cqe pointers

[Andrew Boyer <andrew.boyer@amd.com>]

From: Neel Patel <neel.patel@amd.com>

This memory may be changed by the hardware, so the volatile
keyword is required for correctness.

Fixes: e86a6fcc7cf3 ("net/ionic: add optimized non-scattered Rx/Tx")
cc: stable@dpdk.org

Signed-off-by: Andrew Boyer <andrew.boyer@amd.com>
Signed-off-by: Neel Patel <neel.patel@amd.com>
---
 drivers/net/ionic/ionic_rxtx.c        | 4 ++--
 drivers/net/ionic/ionic_rxtx_sg.c     | 8 +++++---
 drivers/net/ionic/ionic_rxtx_simple.c | 8 +++++---
 3 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ionic/ionic_rxtx.c b/drivers/net/ionic/ionic_rxtx.c
index d92b231f8f..d92fa1cca7 100644
--- a/drivers/net/ionic/ionic_rxtx.c
+++ b/drivers/net/ionic/ionic_rxtx.c
@@ -755,7 +755,7 @@ ionic_dev_rx_descriptor_status(void *rx_queue, uint16_t offset)
 {
 	struct ionic_rx_qcq *rxq = rx_queue;
 	struct ionic_qcq *qcq = &rxq->qcq;
-	struct ionic_rxq_comp *cq_desc;
+	volatile struct ionic_rxq_comp *cq_desc;
 	uint16_t mask, head, tail, pos;
 	bool done_color;
 
@@ -794,7 +794,7 @@ ionic_dev_tx_descriptor_status(void *tx_queue, uint16_t offset)
 {
 	struct ionic_tx_qcq *txq = tx_queue;
 	struct ionic_qcq *qcq = &txq->qcq;
-	struct ionic_txq_comp *cq_desc;
+	volatile struct ionic_txq_comp *cq_desc;
 	uint16_t mask, head, tail, pos, cq_pos;
 	bool done_color;
 
diff --git a/drivers/net/ionic/ionic_rxtx_sg.c b/drivers/net/ionic/ionic_rxtx_sg.c
index 6c028a698c..1392342463 100644
--- a/drivers/net/ionic/ionic_rxtx_sg.c
+++ b/drivers/net/ionic/ionic_rxtx_sg.c
@@ -28,7 +28,8 @@ ionic_tx_flush_sg(struct ionic_tx_qcq *txq)
 	struct ionic_queue *q = &txq->qcq.q;
 	struct ionic_tx_stats *stats = &txq->stats;
 	struct rte_mbuf *txm;
-	struct ionic_txq_comp *cq_desc, *cq_desc_base = cq->base;
+	struct ionic_txq_comp *cq_desc_base = cq->base;
+	volatile struct ionic_txq_comp *cq_desc;
 	void **info;
 	uint32_t i;
 
@@ -254,7 +255,7 @@ ionic_xmit_pkts_sg(void *tx_queue, struct rte_mbuf **tx_pkts,
  */
 static __rte_always_inline void
 ionic_rx_clean_one_sg(struct ionic_rx_qcq *rxq,
-		struct ionic_rxq_comp *cq_desc,
+		volatile struct ionic_rxq_comp *cq_desc,
 		struct ionic_rx_service *rx_svc)
 {
 	struct ionic_queue *q = &rxq->qcq.q;
@@ -440,7 +441,8 @@ ionic_rxq_service_sg(struct ionic_rx_qcq *rxq, uint32_t work_to_do,
 	struct ionic_cq *cq = &rxq->qcq.cq;
 	struct ionic_queue *q = &rxq->qcq.q;
 	struct ionic_rxq_desc *q_desc_base = q->base;
-	struct ionic_rxq_comp *cq_desc, *cq_desc_base = cq->base;
+	struct ionic_rxq_comp *cq_desc_base = cq->base;
+	volatile struct ionic_rxq_comp *cq_desc;
 	uint32_t work_done = 0;
 	uint64_t then, now, hz, delta;
 
diff --git a/drivers/net/ionic/ionic_rxtx_simple.c b/drivers/net/ionic/ionic_rxtx_simple.c
index 5969287b66..00152c885a 100644
--- a/drivers/net/ionic/ionic_rxtx_simple.c
+++ b/drivers/net/ionic/ionic_rxtx_simple.c
@@ -28,7 +28,8 @@ ionic_tx_flush(struct ionic_tx_qcq *txq)
 	struct ionic_queue *q = &txq->qcq.q;
 	struct ionic_tx_stats *stats = &txq->stats;
 	struct rte_mbuf *txm;
-	struct ionic_txq_comp *cq_desc, *cq_desc_base = cq->base;
+	struct ionic_txq_comp *cq_desc_base = cq->base;
+	volatile struct ionic_txq_comp *cq_desc;
 	void **info;
 
 	cq_desc = &cq_desc_base[cq->tail_idx];
@@ -227,7 +228,7 @@ ionic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
  */
 static __rte_always_inline void
 ionic_rx_clean_one(struct ionic_rx_qcq *rxq,
-		struct ionic_rxq_comp *cq_desc,
+		volatile struct ionic_rxq_comp *cq_desc,
 		struct ionic_rx_service *rx_svc)
 {
 	struct ionic_queue *q = &rxq->qcq.q;
@@ -361,7 +362,8 @@ ionic_rxq_service(struct ionic_rx_qcq *rxq, uint32_t work_to_do,
 	struct ionic_cq *cq = &rxq->qcq.cq;
 	struct ionic_queue *q = &rxq->qcq.q;
 	struct ionic_rxq_desc *q_desc_base = q->base;
-	struct ionic_rxq_comp *cq_desc, *cq_desc_base = cq->base;
+	struct ionic_rxq_comp *cq_desc_base = cq->base;
+	volatile struct ionic_rxq_comp *cq_desc;
 	uint32_t work_done = 0;
 	uint64_t then, now, hz, delta;
 
-- 
2.17.1