From 711463f8342769c4cad7c3b54a6cfc2b006c1e42 Mon Sep 17 00:00:00 2001 From: Heiner Kallweit Date: Sat, 15 Feb 2020 14:50:29 +0100 Subject: [PATCH] r8169: add helper rtl_pci_commit In few places we do a PCI commit by reading an arbitrary chip register. It's not always obvious that the read is meant to be a PCI commit, therefore add a helper for it. Signed-off-by: Heiner Kallweit Signed-off-by: David S. Miller --- drivers/net/ethernet/realtek/r8169_main.c | 25 ++++++++++++++--------- 1 file changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c index bc92e8c55fa9..46e8e3dfac0b 100644 --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -689,6 +689,12 @@ static void rtl_unlock_config_regs(struct rtl8169_private *tp) RTL_W8(tp, Cfg9346, Cfg9346_Unlock); } +static void rtl_pci_commit(struct rtl8169_private *tp) +{ + /* Read an arbitrary register to commit a preceding PCI write */ + RTL_R8(tp, ChipCmd); +} + static bool rtl_is_8125(struct rtl8169_private *tp) { return tp->mac_version >= RTL_GIGA_MAC_VER_60; @@ -1319,8 +1325,7 @@ static void rtl8169_irq_mask_and_ack(struct rtl8169_private *tp) { rtl_irq_disable(tp); rtl_ack_events(tp, 0xffffffff); - /* PCI commit */ - RTL_R8(tp, ChipCmd); + rtl_pci_commit(tp); } static void rtl_link_chg_patch(struct rtl8169_private *tp) @@ -1532,7 +1537,7 @@ static int rtl8169_set_features(struct net_device *dev, } RTL_W16(tp, CPlusCmd, tp->cp_cmd); - RTL_R16(tp, CPlusCmd); + rtl_pci_commit(tp); rtl_unlock_work(tp); @@ -1618,7 +1623,7 @@ static bool rtl8169_do_counters(struct rtl8169_private *tp, u32 counter_cmd) u32 cmd; RTL_W32(tp, CounterAddrHigh, (u64)paddr >> 32); - RTL_R32(tp, CounterAddrHigh); + rtl_pci_commit(tp); cmd = (u64)paddr & DMA_BIT_MASK(32); RTL_W32(tp, CounterAddrLow, cmd); RTL_W32(tp, CounterAddrLow, cmd | counter_cmd); @@ -1942,7 +1947,7 @@ static int rtl_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) tp->cp_cmd = (tp->cp_cmd & ~INTT_MASK) | cp01; RTL_W16(tp, CPlusCmd, tp->cp_cmd); - RTL_R16(tp, CPlusCmd); + rtl_pci_commit(tp); rtl_unlock_work(tp); @@ -2260,10 +2265,10 @@ static void rtl_rar_set(struct rtl8169_private *tp, u8 *addr) rtl_unlock_config_regs(tp); RTL_W32(tp, MAC4, addr[4] | addr[5] << 8); - RTL_R32(tp, MAC4); + rtl_pci_commit(tp); RTL_W32(tp, MAC0, addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24); - RTL_R32(tp, MAC0); + rtl_pci_commit(tp); if (tp->mac_version == RTL_GIGA_MAC_VER_34) rtl_rar_exgmac_set(tp, addr); @@ -3873,7 +3878,8 @@ static void rtl_hw_start(struct rtl8169_private *tp) rtl_jumbo_config(tp, tp->dev->mtu); /* Initially a 10 us delay. Turned it into a PCI commit. - FR */ - RTL_R16(tp, CPlusCmd); + rtl_pci_commit(tp); + RTL_W8(tp, ChipCmd, CmdTxEnb | CmdRxEnb); rtl_init_rxcfg(tp); rtl_set_tx_config_registers(tp); @@ -5091,8 +5097,7 @@ static void rtl_wol_shutdown_quirk(struct rtl8169_private *tp) pci_clear_master(tp->pci_dev); RTL_W8(tp, ChipCmd, CmdRxEnb); - /* PCI commit */ - RTL_R8(tp, ChipCmd); + rtl_pci_commit(tp); break; default: break;