From: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Date: Thu, 28 Feb 2019 15:25:52 -0800
Subject: ice: Validate ring existence and its q_vector per VSI
Patch-mainline: v5.2-rc1
Git-commit: a92e1bb6ade7526f0c2b7b462516b1941e965504
References: jsc#SLE-4803

When stopping Tx rings, we use 'i' as an ring array index for looking up
whether the ice_ring exists and have assigned a q_vector. This checks
rings only within a given TC and we need to go through every ring in
VSI. Use 'q_idx' instead.

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/intel/ice/ice_lib.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -2072,7 +2072,8 @@ ice_vsi_stop_tx_rings(struct ice_vsi *vs
 		for (i = 0; i < vsi->tc_cfg.tc_info[tc].qcount_tx; i++) {
 			u16 v_idx;
 
-			if (!rings || !rings[i] || !rings[i]->q_vector) {
+			if (!rings || !rings[q_idx] ||
+			    !rings[q_idx]->q_vector) {
 				err = -EINVAL;
 				goto err_out;
 			}