From: Sergey Nemov <sergey.nemov@intel.com>
Date: Fri, 18 May 2018 11:58:40 +0200
Subject: igb: Wait 10ms just once after TX queues reset
Patch-mainline: v4.18-rc1
Git-commit: 06140c793db51476585ee9abf032845e221982cb
References: bsc#1117495

Move 10ms sleep out of function resetting TX queue.
Reset all the TX queues in one turn and
wait for all of them just once.

Use usleep_range() instead of mdelay() in order not to
affect transmission on other interfaces.

Signed-off-by: Sergey Nemov <sergey.nemov@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/intel/igb/igb_main.c |   13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -4077,11 +4077,6 @@ void igb_configure_tx_ring(struct igb_ad
 	u64 tdba = ring->dma;
 	int reg_idx = ring->reg_idx;
 
-	/* disable the queue */
-	wr32(E1000_TXDCTL(reg_idx), 0);
-	wrfl();
-	mdelay(10);
-
 	wr32(E1000_TDLEN(reg_idx),
 	     ring->count * sizeof(union e1000_adv_tx_desc));
 	wr32(E1000_TDBAL(reg_idx),
@@ -4112,8 +4107,16 @@ void igb_configure_tx_ring(struct igb_ad
  **/
 static void igb_configure_tx(struct igb_adapter *adapter)
 {
+	struct e1000_hw *hw = &adapter->hw;
 	int i;
 
+	/* disable the queues */
+	for (i = 0; i < adapter->num_tx_queues; i++)
+		wr32(E1000_TXDCTL(adapter->tx_ring[i]->reg_idx), 0);
+
+	wrfl();
+	usleep_range(10000, 20000);
+
 	for (i = 0; i < adapter->num_tx_queues; i++)
 		igb_configure_tx_ring(adapter, adapter->tx_ring[i]);
 }