net/hns3: check PCI config space write

[ upstream commit 6dd32de ]

Here adds a check for the return value when calling
rte_pci_write_config.

Coverity issue: 363714
Fixes: cea37e5 ("net/hns3: fix FLR reset")

Signed-off-by: Lijun Ou <oulijun@huawei.com>

drivers/net/hns3/hns3_ethdev_vf.c

@@ -167,8 +167,12 @@ hns3vf_enable_msix(const struct rte_pci_device *device, bool op)
 			control |= PCI_MSIX_FLAGS_ENABLE;
 		else
 			control &= ~PCI_MSIX_FLAGS_ENABLE;
-		rte_pci_write_config(device, &control, sizeof(control),
-				     (pos + PCI_MSIX_FLAGS));
+		ret = rte_pci_write_config(device, &control, sizeof(control),
+					  (pos + PCI_MSIX_FLAGS));
+		if (ret < 0) {
+			PMD_INIT_LOG(ERR, "failed to write PCI offset 0x%x",
+				    (pos + PCI_MSIX_FLAGS));
+		}
 		return 0;
 	}
 	return -1;