netdev - [net-next 03/10] i40e: Limiting RSS queues to CPUs

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Message-Id: <20190122195940.21123-4-jeffrey.t.kirsher@intel.com>
Date:   Tue, 22 Jan 2019 11:59:33 -0800
From:   Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:     davem@...emloft.net
Cc:     Aleksandr Loktionov <aleksandr.loktionov@...el.com>,
        netdev@...r.kernel.org, nhorman@...hat.com, sassmann@...hat.com,
        Andrew Bowers <andrewx.bowers@...el.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 03/10] i40e: Limiting RSS queues to CPUs

From: Aleksandr Loktionov <aleksandr.loktionov@...el.com>

Limiting RSS queues number to online CPUs number in order to
avoid issues with creating misconfigured RSS queues.

Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 0ee641c41be4..b5311846573e 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -11042,6 +11042,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
 	if (!(pf->flags & I40E_FLAG_RSS_ENABLED))
 		return 0;
 
+	queue_count = min_t(int, queue_count, num_online_cpus());
 	new_rss_size = min_t(int, queue_count, pf->rss_size_max);
 
 	if (queue_count != vsi->num_queue_pairs) {
-- 
2.20.1