From: Toshiki Nishioka <toshiki.nishioka@intel.com>
Date: Wed, 21 Jul 2021 17:34:03 -0700
Subject: igc: Use num_tx_queues when iterating over tx_ring queue
Patch-mainline: v5.14
Git-commit: 691bd4d7761992914a0e83c27a4ce57d01474cda
References: jsc#SLE-13533

Use num_tx_queues rather than the IGC_MAX_TX_QUEUES fixed number 4 when
iterating over tx_ring queue since instantiated queue count could be
less than 4 where on-line cpu count is less than 4.

Fixes: ec50a9d437f0 ("igc: Add support for taprio offloading")
Signed-off-by: Toshiki Nishioka <toshiki.nishioka@intel.com>
Signed-off-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>
Tested-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>
Acked-by: Sasha Neftin <sasha.neftin@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/intel/igc/igc_main.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -4709,7 +4709,8 @@ static int igc_save_launchtime_params(st
 	return 0;
 }
 
-static bool validate_schedule(const struct tc_taprio_qopt_offload *qopt)
+static bool validate_schedule(struct igc_adapter *adapter,
+			      const struct tc_taprio_qopt_offload *qopt)
 {
 	int queue_uses[IGC_MAX_TX_QUEUES] = { };
 	size_t n;
@@ -4729,7 +4730,7 @@ static bool validate_schedule(const stru
 		if (e->command != TC_TAPRIO_CMD_SET_GATES)
 			return false;
 
-		for (i = 0; i < IGC_MAX_TX_QUEUES; i++) {
+		for (i = 0; i < adapter->num_tx_queues; i++) {
 			if (e->gate_mask & BIT(i))
 				queue_uses[i]++;
 
@@ -4771,7 +4772,7 @@ static int igc_save_qbv_schedule(struct
 	if (adapter->base_time)
 		return -EALREADY;
 
-	if (!validate_schedule(qopt))
+	if (!validate_schedule(adapter, qopt))
 		return -EINVAL;
 
 	adapter->cycle_time = qopt->cycle_time;
@@ -4786,7 +4787,7 @@ static int igc_save_qbv_schedule(struct
 
 		end_time += e->interval;
 
-		for (i = 0; i < IGC_MAX_TX_QUEUES; i++) {
+		for (i = 0; i < adapter->num_tx_queues; i++) {
 			struct igc_ring *ring = adapter->tx_ring[i];
 
 			if (!(e->gate_mask & BIT(i)))