[dpdk-dev] [PATCH] virtio: Changed variable types to prevent possible data loss in virtio_ethdev.c, virtio_ethdev.h and virtio_rxtx.c

[Maciej Gajdzica]

Changed vtpci_queue_idx type in function virtio_dev_queue_setup from
uint8_t to uint16_t to prevent possible data loss. Also changed type of
head variable in function virtio_send_command from uint32_t to uint16_t.
Issues found with static code analysis tool.

Signed-off-by: Maciej Gajdzica <maciejx.t.gajdzica at intel.com>
---
 lib/librte_pmd_virtio/virtio_ethdev.c |    4 ++--
 lib/librte_pmd_virtio/virtio_ethdev.h |    2 +-
 lib/librte_pmd_virtio/virtio_rxtx.c   |    4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/librte_pmd_virtio/virtio_ethdev.c b/lib/librte_pmd_virtio/virtio_ethdev.c
index b3b5bb6..6624916 100644
--- a/lib/librte_pmd_virtio/virtio_ethdev.c
+++ b/lib/librte_pmd_virtio/virtio_ethdev.c
@@ -106,7 +106,7 @@ static int
 virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
 		int *dlen, int pkt_num)
 {
-	uint32_t head = vq->vq_desc_head_idx, i;
+	uint16_t head = vq->vq_desc_head_idx, i;
 	int k, sum = 0;
 	virtio_net_ctrl_ack status = ~0;
 	struct virtio_pmd_ctrl result;
@@ -233,7 +233,7 @@ virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 			int queue_type,
 			uint16_t queue_idx,
-			uint8_t  vtpci_queue_idx,
+			uint16_t  vtpci_queue_idx,
 			uint16_t nb_desc,
 			unsigned int socket_id,
 			struct virtqueue **pvq)
diff --git a/lib/librte_pmd_virtio/virtio_ethdev.h b/lib/librte_pmd_virtio/virtio_ethdev.h
index 1da3c62..1c463b1 100644
--- a/lib/librte_pmd_virtio/virtio_ethdev.h
+++ b/lib/librte_pmd_virtio/virtio_ethdev.h
@@ -87,7 +87,7 @@ void virtio_dev_rxtx_start(struct rte_eth_dev *dev);
 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 			int queue_type,
 			uint16_t queue_idx,
-			uint8_t  vtpci_queue_idx,
+			uint16_t  vtpci_queue_idx,
 			uint16_t nb_desc,
 			unsigned int socket_id,
 			struct virtqueue **pvq);
diff --git a/lib/librte_pmd_virtio/virtio_rxtx.c b/lib/librte_pmd_virtio/virtio_rxtx.c
index c013f97..468e978 100644
--- a/lib/librte_pmd_virtio/virtio_rxtx.c
+++ b/lib/librte_pmd_virtio/virtio_rxtx.c
@@ -369,7 +369,7 @@ virtio_dev_rx_queue_setup(struct rte_eth_dev *dev,
 			__rte_unused const struct rte_eth_rxconf *rx_conf,
 			struct rte_mempool *mp)
 {
-	uint8_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_RQ_QUEUE_IDX;
+	uint16_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_RQ_QUEUE_IDX;
 	struct virtqueue *vq;
 	int ret;
 
@@ -402,7 +402,7 @@ virtio_dev_tx_queue_setup(struct rte_eth_dev *dev,
 			unsigned int socket_id,
 			const struct rte_eth_txconf *tx_conf)
 {
-	uint8_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_TQ_QUEUE_IDX;
+	uint16_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_TQ_QUEUE_IDX;
 	struct virtqueue *vq;
 	int ret;
 
-- 
1.7.9.5