From bac75d8565e800f7a4494d8c873e38dce33d6079 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Sat, 30 May 2020 23:57:10 +0200
Subject: [PATCH] r8169: move some calls to rtl8169_hw_reset
Git-commit: bac75d8565e800f7a4494d8c873e38dce33d6079
Patch-mainline: v5.8-rc1
References: bsc#1175746

Move calls that are needed before and after calling rtl8169_hw_reset()
into this function. This requires to move the function in the code.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/ethernet/realtek/r8169_main.c | 75 +++++++++++++++----------------
 1 file changed, 36 insertions(+), 39 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 43652c450892..5f3c50fb0647 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2530,36 +2530,6 @@ static void rtl_enable_rxdvgate(struct rtl8169_private *tp)
 	rtl_wait_txrx_fifo_empty(tp);
 }
 
-static void rtl8169_hw_reset(struct rtl8169_private *tp)
-{
-	/* Disable interrupts */
-	rtl8169_irq_mask_and_ack(tp);
-
-	rtl_rx_close(tp);
-
-	switch (tp->mac_version) {
-	case RTL_GIGA_MAC_VER_27:
-	case RTL_GIGA_MAC_VER_28:
-	case RTL_GIGA_MAC_VER_31:
-		rtl_loop_wait_low(tp, &rtl_npq_cond, 20, 2000);
-		break;
-	case RTL_GIGA_MAC_VER_34 ... RTL_GIGA_MAC_VER_38:
-		RTL_W8(tp, ChipCmd, RTL_R8(tp, ChipCmd) | StopReq);
-		rtl_loop_wait_high(tp, &rtl_txcfg_empty_cond, 100, 666);
-		break;
-	case RTL_GIGA_MAC_VER_40 ... RTL_GIGA_MAC_VER_61:
-		rtl_enable_rxdvgate(tp);
-		fsleep(2000);
-		break;
-	default:
-		RTL_W8(tp, ChipCmd, RTL_R8(tp, ChipCmd) | StopReq);
-		udelay(100);
-		break;
-	}
-
-	rtl_hw_reset(tp);
-}
-
 static void rtl_set_tx_config_registers(struct rtl8169_private *tp)
 {
 	u32 val = TX_DMA_BURST << TxDMAShift |
@@ -3958,6 +3928,42 @@ static void rtl8169_tx_clear(struct rtl8169_private *tp)
 	netdev_reset_queue(tp->dev);
 }
 
+static void rtl8169_hw_reset(struct rtl8169_private *tp)
+{
+	/* Give a racing hard_start_xmit a few cycles to complete. */
+	synchronize_rcu();
+
+	/* Disable interrupts */
+	rtl8169_irq_mask_and_ack(tp);
+
+	rtl_rx_close(tp);
+
+	switch (tp->mac_version) {
+	case RTL_GIGA_MAC_VER_27:
+	case RTL_GIGA_MAC_VER_28:
+	case RTL_GIGA_MAC_VER_31:
+		rtl_loop_wait_low(tp, &rtl_npq_cond, 20, 2000);
+		break;
+	case RTL_GIGA_MAC_VER_34 ... RTL_GIGA_MAC_VER_38:
+		RTL_W8(tp, ChipCmd, RTL_R8(tp, ChipCmd) | StopReq);
+		rtl_loop_wait_high(tp, &rtl_txcfg_empty_cond, 100, 666);
+		break;
+	case RTL_GIGA_MAC_VER_40 ... RTL_GIGA_MAC_VER_61:
+		rtl_enable_rxdvgate(tp);
+		fsleep(2000);
+		break;
+	default:
+		RTL_W8(tp, ChipCmd, RTL_R8(tp, ChipCmd) | StopReq);
+		fsleep(100);
+		break;
+	}
+
+	rtl_hw_reset(tp);
+
+	rtl8169_tx_clear(tp);
+	rtl8169_init_ring_indexes(tp);
+}
+
 static void rtl_reset_work(struct rtl8169_private *tp)
 {
 	struct net_device *dev = tp->dev;
@@ -3965,16 +3971,12 @@ static void rtl_reset_work(struct rtl8169_private *tp)
 
 	napi_disable(&tp->napi);
 	netif_stop_queue(dev);
-	synchronize_rcu();
 
 	rtl8169_hw_reset(tp);
 
 	for (i = 0; i < NUM_RX_DESC; i++)
 		rtl8169_mark_to_asic(tp->RxDescArray + i);
 
-	rtl8169_tx_clear(tp);
-	rtl8169_init_ring_indexes(tp);
-
 	napi_enable(&tp->napi);
 	rtl_hw_start(tp);
 	netif_wake_queue(dev);
@@ -4636,11 +4638,6 @@ static void rtl8169_down(struct net_device *dev)
 
 	rtl8169_hw_reset(tp);
 
-	/* Give a racing hard_start_xmit a few cycles to complete. */
-	synchronize_rcu();
-
-	rtl8169_tx_clear(tp);
-
 	rtl8169_rx_clear(tp);
 
 	rtl_pll_power_down(tp);
-- 
2.16.4