[dpdk-stable] [PATCH v2] ethdev: fix switching domain allocation

[Viacheslav Ovsiienko]

The maximum amount of unique swutching domain is supposed
to be equal RTE_MAX_ETHPORTS. Current implementation allows
to allocate only RTE_MAX_ETHPORTS-1 domains.

The definition of RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID is
changed from 0 to UINT16_MAX, the rte_eth_dev_info_get is
updated to initialize dev_ibfo structure accordingly.

Fixes: ce9250406323 ("ethdev: add switch domain allocator")
Cc: stable at dpdk.org

Signed-off-by: Viacheslav Ovsiienko <viacheslavo at mellanox.com>

---
v1: - http://patches.dpdk.org/patch/64011/
v2: - RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID is defined as UINT16_MAX
    - valid domain range to allocate: 0..RTE_MAX_ETHPORTS-1

 lib/librte_ethdev/rte_ethdev.c | 4 ++--
 lib/librte_ethdev/rte_ethdev.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 6e9cb24..19a88e9 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -2968,6 +2968,7 @@ struct rte_eth_dev *
 	 * return status and does not know if get is successful or not.
 	 */
 	memset(dev_info, 0, sizeof(struct rte_eth_dev_info));
+	dev_info->switch_info.domain_id = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID;
 
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
 	dev = &rte_eth_devices[port_id];
@@ -5064,8 +5065,7 @@ enum rte_eth_switch_domain_state {
 
 	*domain_id = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID;
 
-	for (i = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID + 1;
-		i < RTE_MAX_ETHPORTS; i++) {
+	for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
 		if (rte_eth_switch_domains[i].state ==
 			RTE_ETH_SWITCH_DOMAIN_UNUSED) {
 			rte_eth_switch_domains[i].state =
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index 18a9def..d1a593a 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -1196,7 +1196,7 @@ struct rte_eth_dev_portconf {
  * Default values for switch domain id when ethdev does not support switch
  * domain definitions.
  */
-#define RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID	(0)
+#define RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID	(UINT16_MAX)
 
 /**
  * Ethernet device associated switch information
-- 
1.8.3.1