linux-kernel - [PATCH 5.4 25/40] i40e: Fix log TC creation failure when max num of queues is exceeded

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Date:   Mon,  2 Aug 2021 15:45:05 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Grzegorz Szczurek <grzegorzx.szczurek@...el.com>,
        Jedrzej Jagielski <jedrzej.jagielski@...el.com>,
        Imam Hassan Reza Biswas <imam.hassan.reza.biswas@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 25/40] i40e: Fix log TC creation failure when max num of queues is exceeded

From: Jedrzej Jagielski <jedrzej.jagielski@...el.com>

[ Upstream commit ea52faae1d17cd3048681d86d2e8641f44de484d ]

Fix missing failed message if driver does not have enough queues to
complete TC command. Without this fix no message is displayed in dmesg.

Fixes: a9ce82f744dc ("i40e: Enable 'channel' mode in mqprio for TC configs")
Signed-off-by: Grzegorz Szczurek <grzegorzx.szczurek@...el.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@...el.com>
Tested-by: Imam Hassan Reza Biswas <imam.hassan.reza.biswas@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 7140c1386143..21ab7d2caddf 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -6878,6 +6878,8 @@ static int i40e_validate_mqprio_qopt(struct i40e_vsi *vsi,
 	}
 	if (vsi->num_queue_pairs <
 	    (mqprio_qopt->qopt.offset[i] + mqprio_qopt->qopt.count[i])) {
+		dev_err(&vsi->back->pdev->dev,
+			"Failed to create traffic channel, insufficient number of queues.\n");
 		return -EINVAL;
 	}
 	if (sum_max_rate > i40e_get_link_speed(vsi)) {
-- 
2.30.2