linux-kernel - [PATCH 5.12 052/161] ice: Fix allowing VF to request more/less queues via virtchnl

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Date:   Tue,  8 Jun 2021 20:26:22 +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, Brett Creeley <brett.creeley@...el.com>,
        Konrad Jankowski <konrad0.jankowski@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 052/161] ice: Fix allowing VF to request more/less queues via virtchnl

From: Brett Creeley <brett.creeley@...el.com>

[ Upstream commit f0457690af56673cb0c47af6e25430389a149225 ]

Commit 12bb018c538c ("ice: Refactor VF reset") caused a regression
that removes the ability for a VF to request a different amount of
queues via VIRTCHNL_OP_REQUEST_QUEUES. This prevents VF drivers to
either increase or decrease the number of queue pairs they are
allocated. Fix this by using the variable vf->num_req_qs when
determining the vf->num_vf_qs during VF VSI creation.

Fixes: 12bb018c538c ("ice: Refactor VF reset")
Signed-off-by: Brett Creeley <brett.creeley@...el.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/intel/ice/ice_lib.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 9b38b2768884..27e439853c3b 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -198,6 +198,8 @@ static void ice_vsi_set_num_qs(struct ice_vsi *vsi, u16 vf_id)
 		break;
 	case ICE_VSI_VF:
 		vf = &pf->vf[vsi->vf_id];
+		if (vf->num_req_qs)
+			vf->num_vf_qs = vf->num_req_qs;
 		vsi->alloc_txq = vf->num_vf_qs;
 		vsi->alloc_rxq = vf->num_vf_qs;
 		/* pf->num_msix_per_vf includes (VF miscellaneous vector +
-- 
2.30.2