[PATCH v2] net/vmxnet3: fix return code in initializing

[Kaijun Zeng]

Improve error handling

Fixes: dfaff37fc46d ("vmxnet3: import new vmxnet3 poll mode driver implementation")
Cc: stable at dpdk.org

Signed-off-by: Kaijun Zeng <corezeng at gmail.com>
---
 drivers/net/vmxnet3/vmxnet3_rxtx.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index 73ec1e4727..e615d40d09 100644
--- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
+++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
@@ -1311,7 +1311,17 @@ vmxnet3_dev_rxtx_init(struct rte_eth_dev *dev)
 		for (j = 0; j < VMXNET3_RX_CMDRING_SIZE; j++) {
 			/* Passing 0 as alloc_num will allocate full ring */
 			ret = vmxnet3_post_rx_bufs(rxq, j);
-			if (ret <= 0) {
+
+			/* Zero number of descriptors in the configuration of the RX queue */
+			if (ret == 0) {
+				PMD_INIT_LOG(ERR,
+					"ERROR: Zero descriptor requirement in Rx queue: %d,"
+					"buffers ring: %d\n",
+					i, j);
+				return -EINVAL;
+			}
+			/* Return the errno */
+			if (ret < 0) {
 				PMD_INIT_LOG(ERR,
 					     "ERROR: Posting Rxq: %d buffers ring: %d",
 					     i, j);
-- 
2.30.2