linux-kernel - [PATCH iwl-net v1 3/4] igc: Remove unused qbv

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Date: Tue,  2 Jul 2024 00:09:25 -0400
From: Faizal Rahim <faizal.abdul.rahim@...ux.intel.com>
To: "David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Tony Nguyen <anthony.l.nguyen@...el.com>,
	Vinicius Costa Gomes <vinicius.gomes@...el.com>
Cc: intel-wired-lan@...ts.osuosl.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org,
	Faizal Rahim <faizal.abdul.rahim@...ux.intel.com>
Subject: [PATCH iwl-net v1 3/4] igc: Remove unused qbv_count

Removing qbv_count which is now obsolete after these 2 patches:
"igc: Fix reset adapter logics when tx mode change"
"igc: Fix qbv_config_change_errors logics"

The variable qbv_count serves to indicate whether Taprio is active or if
the tx mode is in TSN (IGC_TQAVCTRL_TRANSMIT_MODE_TSN). This is due to its
unconditional increment within igc_tsn_enable_offload(), which both runs
Taprio and sets the tx mode to TSN.

Signed-off-by: Faizal Rahim <faizal.abdul.rahim@...ux.intel.com>
---
 drivers/net/ethernet/intel/igc/igc.h      | 1 -
 drivers/net/ethernet/intel/igc/igc_main.c | 1 -
 drivers/net/ethernet/intel/igc/igc_tsn.c  | 2 --
 3 files changed, 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h
index 8b14c029eda1..5fd0d85f83ac 100644
--- a/drivers/net/ethernet/intel/igc/igc.h
+++ b/drivers/net/ethernet/intel/igc/igc.h
@@ -254,7 +254,6 @@ struct igc_adapter {
 	bool taprio_offload_enable;
 	u32 qbv_config_change_errors;
 	bool qbv_transition;
-	unsigned int qbv_count;
 	/* Access to oper_gate_closed, admin_gate_closed and qbv_transition
 	 * are protected by the qbv_tx_lock.
 	 */
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 0f8a5ad940ec..e7664bd81505 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -6246,7 +6246,6 @@ static int igc_qbv_clear_schedule(struct igc_adapter *adapter)
 	adapter->cycle_time = NSEC_PER_SEC;
 	adapter->taprio_offload_enable = false;
 	adapter->qbv_config_change_errors = 0;
-	adapter->qbv_count = 0;
 
 	for (i = 0; i < adapter->num_tx_queues; i++) {
 		struct igc_ring *ring = adapter->tx_ring[i];
diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.c b/drivers/net/ethernet/intel/igc/igc_tsn.c
index 61f047ebf34d..26dbe3442ad1 100644
--- a/drivers/net/ethernet/intel/igc/igc_tsn.c
+++ b/drivers/net/ethernet/intel/igc/igc_tsn.c
@@ -267,8 +267,6 @@ static int igc_tsn_enable_offload(struct igc_adapter *adapter)
 
 	tqavctrl |= IGC_TQAVCTRL_TRANSMIT_MODE_TSN | IGC_TQAVCTRL_ENHANCED_QAV;
 
-	adapter->qbv_count++;
-
 	cycle = adapter->cycle_time;
 	base_time = adapter->base_time;
 
-- 
2.25.1