netdev - [v2 PATCH net] i40e/iavf: Fix msg interface between VF and PF

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Date:   Fri, 8 Nov 2019 11:57:36 +0000
From:   Arkady Gilinsky <arkady.gilinsky@...monicinc.com>
To:     "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "jeffrey.t.kirsher@...el.com" <jeffrey.t.kirsher@...el.com>
Subject: [v2 PATCH net] i40e/iavf: Fix msg interface between VF and PF

>From af0e91423ea6ea37b48ee8b555314fd01964335d Mon Sep 17 00:00:00 2001
From: Arkady Gilinsky <arkady.gilinsky@...monicinc.com>
Date: Fri, 8 Nov 2019 13:48:03 +0200
Subject: [[v2] PATCH net] i40e/iavf: Fix msg interface between VF and PF

 * The original issue was that iavf driver passing TX/RX queues
   as bitmap in iavf_disable_queues and the i40e driver
   interprets this message as an absolute number in
   i40e_vc_disable_queues_msg, so the validation in the
   latter function always fail.
   The commit fixes the issue and adds validation of the
   queue bitmap to the i40e_vc_enable_queues_msg function.

Signed-off-by: Arkady Gilinsky <arkady.gilinsky@...monicinc.com>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 3d2440838822..573252e9fb78 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -2347,7 +2347,9 @@ static int i40e_vc_enable_queues_msg(struct i40e_vf *vf, u8 *msg)
 		goto error_param;
 	}
 
-	if ((0 == vqs->rx_queues) && (0 == vqs->tx_queues)) {
+	if ((vqs->rx_queues == 0 && vqs->tx_queues == 0) ||
+	    vqs->rx_queues >= BIT(I40E_MAX_VF_QUEUES) ||
+	    vqs->tx_queues >= BIT(I40E_MAX_VF_QUEUES)) {
 		aq_ret = I40E_ERR_PARAM;
 		goto error_param;
 	}
@@ -2410,8 +2412,8 @@ static int i40e_vc_disable_queues_msg(struct i40e_vf *vf, u8 *msg)
 	}
 
 	if ((vqs->rx_queues == 0 && vqs->tx_queues == 0) ||
-	    vqs->rx_queues > I40E_MAX_VF_QUEUES ||
-	    vqs->tx_queues > I40E_MAX_VF_QUEUES) {
+	    vqs->rx_queues >= BIT(I40E_MAX_VF_QUEUES) ||
+	    vqs->tx_queues >= BIT(I40E_MAX_VF_QUEUES)) {
 		aq_ret = I40E_ERR_PARAM;
 		goto error_param;
 	}
-- 
2.11.0