From 9aa7e9355db342fda17d716bcf5ce62df7a02e61 Mon Sep 17 00:00:00 2001
From: Frank Zhang <frank_1.zhang@intel.com>
Date: Tue, 20 May 2014 08:01:42 +0000
Subject: [PATCH] i40e: keep SR-IOV enabled in the case that RSS, VMDQ, FD_SB
and DCB are disabled
Modify the logic in i40e_determine_queue_usage() so that
SR-IOV doesn't get turned off unnecessarily.
Change-ID: I86ca304fa9f742a50e9ea831b887f358a6a9d53d
Signed-off-by: Frank Zhang <frank_1.zhang@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
drivers/net/ethernet/intel/i40e/i40e_main.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index eb32c5ce3eb35..b5f0dea0760b4 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -8180,9 +8180,7 @@ static void i40e_determine_queue_usage(struct i40e_pf *pf)
queues_left = pf->hw.func_caps.num_tx_qp;
if ((queues_left == 1) ||
- !(pf->flags & I40E_FLAG_MSIX_ENABLED) ||
- !(pf->flags & (I40E_FLAG_RSS_ENABLED | I40E_FLAG_FD_SB_ENABLED |
- I40E_FLAG_DCB_ENABLED))) {
+ !(pf->flags & I40E_FLAG_MSIX_ENABLED)) {
/* one qp for PF, no queues for anything else */
queues_left = 0;
pf->rss_size = pf->num_lan_qps = 1;
@@ -8194,6 +8192,18 @@ static void i40e_determine_queue_usage(struct i40e_pf *pf)
I40E_FLAG_DCB_ENABLED |
I40E_FLAG_SRIOV_ENABLED |
I40E_FLAG_VMDQ_ENABLED);
+ } else if (!(pf->flags & (I40E_FLAG_RSS_ENABLED |
+ I40E_FLAG_FD_SB_ENABLED |
+ I40E_FLAG_DCB_ENABLED))) {
+ /* one qp for PF */
+ pf->rss_size = pf->num_lan_qps = 1;
+ queues_left -= pf->num_lan_qps;
+
+ pf->flags &= ~(I40E_FLAG_RSS_ENABLED |
+ I40E_FLAG_FD_SB_ENABLED |
+ I40E_FLAG_FD_ATR_ENABLED |
+ I40E_FLAG_DCB_ENABLED |
+ I40E_FLAG_VMDQ_ENABLED);
} else {
/* Not enough queues for all TCs */
if ((pf->flags & I40E_FLAG_DCB_ENABLED) &&
--
2.39.5