net/vmxnet3: fix return code in initializing

[ upstream commit 8a2de735318b38ba93a041cb2f209889bde02689 ]

Improve error handling

Bugzilla ID: 1239
Fixes: dfaff37 ("vmxnet3: import new vmxnet3 poll mode driver implementation")

Signed-off-by: Kaijun Zeng <corezeng@gmail.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@amd.com>

.mailmap

@@ -677,6 +677,7 @@ Jun Yang <jun.yang@nxp.com>
 Junyu Jiang <junyux.jiang@intel.com>
 Juraj Linkeš <juraj.linkes@pantheon.tech>
 Kai Ji <kai.ji@intel.com>
+Kaijun Zeng <corezeng@gmail.com>
 Kaiwen Deng <kaiwenx.deng@intel.com>
 Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
 Kamalakannan R <kamalakannan.r@intel.com>

drivers/net/vmxnet3/vmxnet3_rxtx.c

@@ -1269,11 +1269,18 @@ 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: Posting Rxq: %d buffers ring: %d",
-					     i, j);
-				return -ret;
+					"Invalid configuration in Rx queue: %d, buffers ring: %d\n",
+					i, j);
+				return -EINVAL;
+			}
+			/* Return the error number */
+			if (ret < 0) {
+				PMD_INIT_LOG(ERR, "Posting Rxq: %d buffers ring: %d", i, j);
+				return ret;
 			}
 			/*
 			 * Updating device with the index:next2fill to fill the