[dpdk-stable] [PATCH 19.11.6] ethdev: fix data type in TC queues

[Lijun Ou]

From: Huisong Li <lihuisong at huawei.com>

[ upstream commit 9f6dc8592d54aa2ec1800c53977a31bd7922147b ]

Currently, base and nb_queue in the tc_rxq and tc_txq information
of queue and TC mapping on both TX and RX paths are uint8_t.
However, these data will be truncated when queue number under a TC
is greater than 256. So it is necessary for base and nb_queue to
change from uint8_t to uint16_t.

Fixes: 89d6728c7837 ("ethdev: get DCB information")
Cc: stable at dpdk.org

Signed-off-by: Huisong Li <lihuisong at huawei.com>
Signed-off-by: Min Hu (Connor) <humin29 at huawei.com>
Reviewed-by: Wei Hu (Xavier) <xavier.huwei at huawei.com>
Reviewed-by: Dongdong Liu <liudongdong3 at huawei.com>
Acked-by: Thomas Monjalon <thomas at monjalon.net>
Reviewed-by: Ferruh Yigit <ferruh.yigit at intel.com>
---
 doc/guides/rel_notes/release_19_11.rst | 5 +++++
 lib/librte_ethdev/rte_ethdev.h         | 8 ++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/doc/guides/rel_notes/release_19_11.rst b/doc/guides/rel_notes/release_19_11.rst
index acd18a3..cba8ebd 100644
--- a/doc/guides/rel_notes/release_19_11.rst
+++ b/doc/guides/rel_notes/release_19_11.rst
@@ -457,6 +457,11 @@ API Changes
 * ethdev: changed ``rte_eth_dev_owner_delete`` return value from ``void`` to
   ``int`` to provide a way to report various error conditions.
 
+* ethdev: Modified field type of ``base`` and ``nb_queue`` in struct
+  ``rte_eth_dcb_tc_queue_mapping`` from ``uint8_t`` to ``uint16_t``.
+  As the data of ``uint8_t`` will be truncated when queue number under
+  a TC is greater than 256.
+
 * ethdev: The deprecated function ``rte_eth_dev_count`` was removed.
   The function ``rte_eth_dev_count_avail`` is a drop-in replacement.
   If the intent is to iterate over ports, ``RTE_ETH_FOREACH_*`` macros
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index 51f9f25..5fedff0 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -1360,13 +1360,13 @@ struct rte_eth_xstat_name {
 struct rte_eth_dcb_tc_queue_mapping {
 	/** rx queues assigned to tc per Pool */
 	struct {
-		uint8_t base;
-		uint8_t nb_queue;
+		uint16_t base;
+		uint16_t nb_queue;
 	} tc_rxq[ETH_MAX_VMDQ_POOL][ETH_DCB_NUM_TCS];
 	/** rx queues assigned to tc per Pool */
 	struct {
-		uint8_t base;
-		uint8_t nb_queue;
+		uint16_t base;
+		uint16_t nb_queue;
 	} tc_txq[ETH_MAX_VMDQ_POOL][ETH_DCB_NUM_TCS];
 };
 
-- 
2.7.4