[dpdk-stable] patch 'net/ixgbe: fix the failure of number of Tx queue check' has been queued to LTS release 16.11.5

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to LTS release 16.11.5

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 01/28/18. So please
shout if anyone has objections.

Thanks.

Luca Boccassi

---
>From 584d60f2e1a52aaec261dfab21142432b30acbdf Mon Sep 17 00:00:00 2001
From: Yanglong Wu <yanglong.wu at intel.com>
Date: Wed, 10 Jan 2018 09:51:36 +0800
Subject: [PATCH] net/ixgbe: fix the failure of number of Tx queue check

[ upstream commit 12da1deb89806c0a0d974948d11712e4f06c6b93 ]

Tx_q check fails when the SRIOV is active and tx_q > rx_q. It has
to use the maximum HW queue number for calculation, to get the
right number of queue can be used.

Fixes: 27b609cbd1c6 ("ethdev: move the multi-queue mode check to specific drivers")

Signed-off-by: Yanglong Wu <yanglong.wu at intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev at intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 73996bbec..9be3f3cd0 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -93,6 +93,9 @@
 /* Timer value included in XOFF frames. */
 #define IXGBE_FC_PAUSE 0x680
 
+/*Default value of Max Rx Queue*/
+#define IXGBE_MAX_RX_QUEUE_NUM 128
+
 #define IXGBE_LINK_DOWN_CHECK_TIMEOUT 4000 /* ms */
 #define IXGBE_LINK_UP_CHECK_TIMEOUT   1000 /* ms */
 #define IXGBE_VMDQ_NUM_UC_MAC         4096 /* Maximum nb. of UC MAC addr. */
@@ -1959,9 +1962,10 @@ ixgbe_check_vf_rss_rxq_num(struct rte_eth_dev *dev, uint16_t nb_rx_q)
 		return -EINVAL;
 	}
 
-	RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool = nb_rx_q;
-	RTE_ETH_DEV_SRIOV(dev).def_pool_q_idx = dev->pci_dev->max_vfs * nb_rx_q;
-
+	RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool =
+		IXGBE_MAX_RX_QUEUE_NUM / RTE_ETH_DEV_SRIOV(dev).active;
+	RTE_ETH_DEV_SRIOV(dev).def_pool_q_idx =
+		dev->pci_dev->max_vfs * RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool;
 	return 0;
 }
 
-- 
2.14.2