[dpdk-stable] [PATCH v2] net/virtio: fix check scatter on all Rx queues

[zhihongx.peng at intel.com]

From: Zhihong Peng <zhihongx.peng at intel.com>

This patch fixes the wrong way to obtain virtqueue.
The end of virtqueue cannot be judged based on whether
the array is NULL.

Fixes: 4e8169eb0d2d (net/virtio: fix Rx scatter offload)
Cc: stable at dpdk.org

Signed-off-by: Zhihong Peng <zhihongx.peng at intel.com>
---
 drivers/net/virtio/virtio_ethdev.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index b60eeb24ab..213110cff4 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -888,8 +888,11 @@ virtio_check_scatter_on_all_rx_queues(struct rte_eth_dev *dev,
 	if (hw->vqs == NULL)
 		return true;
 
-	for (qidx = 0; (vq = hw->vqs[2 * qidx + VTNET_SQ_RQ_QUEUE_IDX]) != NULL;
-	     qidx++) {
+	for (qidx = 0; qidx < hw->max_queue_pairs; qidx++) {
+		vq = hw->vqs[2 * qidx + VTNET_SQ_RQ_QUEUE_IDX];
+		if (vq == NULL)
+			continue;
+
 		rxvq = &vq->rxq;
 		if (rxvq->mpool == NULL)
 			continue;
-- 
2.25.1