Add a sanity check for number of tx descriptors requested during tx
queue setup. Return -EINVAL if the number requested does not meet
the tx descriptor requirements of the device.
Fixes: 80a1deb4c77a ("ethdev: add API to retrieve queue information")
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy at chelsio.com>
Signed-off-by: Kumar Sanghvi <kumaras at chelsio.com>
---
lib/librte_ether/rte_ethdev.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index b19ac9a..dfd6c0b 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -1342,6 +1342,18 @@ rte_eth_tx_queue_setup(uint8_t port_id, uint16_t
tx_queue_id,
rte_eth_dev_info_get(port_id, &dev_info);
+ if (nb_tx_desc > dev_info.tx_desc_lim.nb_max ||
+ nb_tx_desc < dev_info.tx_desc_lim.nb_min ||
+ nb_tx_desc % dev_info.tx_desc_lim.nb_align != 0) {
+ PMD_DEBUG_TRACE("Invalid value for nb_tx_desc(=%hu), "
+ "should be: <= %hu, = %hu, and a product of
%hu\n",
+ nb_tx_desc,
+ dev_info.tx_desc_lim.nb_max,
+ dev_info.tx_desc_lim.nb_min,
+ dev_info.tx_desc_lim.nb_align);
+ return -EINVAL;
+ }
+
if (tx_conf == NULL)
tx_conf = &dev_info.default_txconf;
--
2.5.3
