[dpdk-dev] [RFC PATCH 12/17] virtio: Move allocation before initialization

[Ouyang Changchun <changchun.ouyang@intel.com>]

If allocation fails, don't want to leave virtio device stuck
in middle of initialization sequence.

Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 lib/librte_pmd_virtio/virtio_ethdev.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/lib/librte_pmd_virtio/virtio_ethdev.c b/lib/librte_pmd_virtio/virtio_ethdev.c
index c17cac8..13feda5 100644
--- a/lib/librte_pmd_virtio/virtio_ethdev.c
+++ b/lib/librte_pmd_virtio/virtio_ethdev.c
@@ -890,6 +890,15 @@ eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
 	if (rte_eal_process_type() == RTE_PROC_SECONDARY)
 		return 0;
 
+	/* Allocate memory for storing MAC addresses */
+	eth_dev->data->mac_addrs = rte_zmalloc("virtio", ETHER_ADDR_LEN, 0);
+	if (eth_dev->data->mac_addrs == NULL) {
+		PMD_INIT_LOG(ERR,
+			"Failed to allocate %d bytes needed to store MAC addresses",
+			ETHER_ADDR_LEN);
+		return -ENOMEM;
+	}
+
 	/* Tell the host we've noticed this device. */
 	vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
 
@@ -916,15 +925,6 @@ eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
 		hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
 	}
 
-	/* Allocate memory for storing MAC addresses */
-	eth_dev->data->mac_addrs = rte_zmalloc("virtio", ETHER_ADDR_LEN, 0);
-	if (eth_dev->data->mac_addrs == NULL) {
-		PMD_INIT_LOG(ERR,
-			"Failed to allocate %d bytes needed to store MAC addresses",
-			ETHER_ADDR_LEN);
-		return -ENOMEM;
-	}
-
 	/* Copy the permanent MAC address to: virtio_hw */
 	virtio_get_hwaddr(hw);
 	ether_addr_copy((struct ether_addr *) hw->mac_addr,
-- 
1.8.4.2