[dpdk-dev] [PATCH v2] net/tap: fix dev name look-up

[Pascal Mazon <pascal.mazon@6wind.com>]

Store the device name in dev->data->name, to have symmetrical behavior
between rte_pmd_tap_probe(name) and rte_pmd_tap_remove(name).

The netdevice name (linux interface name) is stored in the name field of
struct pmd_internals.

There's no need to allocate an rte_eth_dev_data, as it is done in
rte_eth_dev_allocate()/rte_eth_dev_data_alloc().

Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
---
 drivers/net/tap/rte_eth_tap.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index 47a706070652..839c4187a47f 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -651,23 +651,22 @@ eth_dev_tap_create(const char *name, char *tap_name)
 
 	RTE_LOG(DEBUG, PMD, "  TAP device on numa %u\n", rte_socket_id());
 
-	data = rte_zmalloc_socket(tap_name, sizeof(*data), 0, numa_node);
-	if (!data) {
-		RTE_LOG(ERR, PMD, "TAP Failed to allocate data\n");
-		goto error_exit;
-	}
-
 	pmd = rte_zmalloc_socket(tap_name, sizeof(*pmd), 0, numa_node);
 	if (!pmd) {
 		RTE_LOG(ERR, PMD, "TAP Unable to allocate internal struct\n");
 		goto error_exit;
 	}
 
-	dev = rte_eth_dev_allocate(tap_name);
+	dev = rte_eth_dev_allocate(name);
 	if (!dev) {
 		RTE_LOG(ERR, PMD, "TAP Unable to allocate device struct\n");
 		goto error_exit;
 	}
+	data = dev->data;
+	if (!dev->data) {
+		RTE_LOG(ERR, PMD, "TAP Failed to allocate data\n");
+		goto error_exit;
+	}
 
 	snprintf(pmd->name, sizeof(pmd->name), "%s", tap_name);
 
@@ -686,12 +685,10 @@ eth_dev_tap_create(const char *name, char *tap_name)
 	data->nb_rx_queues = pmd->nb_queues;
 	data->nb_tx_queues = pmd->nb_queues;
 
-	dev->data = data;
 	dev->dev_ops = &ops;
 	dev->driver = NULL;
 	dev->rx_pkt_burst = pmd_rx_burst;
 	dev->tx_pkt_burst = pmd_tx_burst;
-	snprintf(dev->data->name, sizeof(dev->data->name), "%s", name);
 
 	/* Presetup the fds to -1 as being not valid */
 	for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
-- 
2.8.0.rc0