path: root/drivers/net/ethernet
diff options
authorAzat Khuzhin <a3at.mail@gmail.com>2018-08-26 17:03:09 +0300
committerDavid S. Miller <davem@davemloft.net>2018-08-29 18:06:27 -0700
commit05212ba8132b42047ab5d63d759c6f9c28e7eab5 (patch)
tree38b0e8f84cc81bf330da9bd4b2c431514f488411 /drivers/net/ethernet
parenttipc: switch to rhashtable iterator (diff)
r8169: set RxConfig after tx/rx is enabled for RTL8169sb/8110sb devices
I have two Ethernet adapters: r8169 0000:03:01.0 eth0: RTL8169sb/8110sb, 00:14:d1:14:2d:49, XID 10000000, IRQ 18 r8169 0000:01:00.0 eth0: RTL8168e/8111e, 64:66:b3:11:14:5d, XID 2c200000, IRQ 30 And after upgrading from linux 4.15 [1] to linux 4.18+ [2] RTL8169sb failed to receive any packets. tcpdump shows a lot of checksum mismatch. [1]: a0f79386a4968b4925da6db2d1daffd0605a4402 [2]: 0519359784328bfa92bf0931bf0cff3b58c16932 (4.19 merge window opened) I started bisecting and the found that [3] breaks it. According to [4]: "For 8110S, 8110SB, and 8110SC series, the initial value of RxConfig needs to be set after the tx/rx is enabled." So I moved rtl_init_rxcfg() after enabling tx/rs and now my adapter works (RTL8168e works too). [3]: 3559d81e76bfe3803e89f2e04cf6ef7ab4f3aace [4]: e542a2269f232d61270ceddd42b73a4348dee2bb ("r8169: adjust the RxConfig settings.") Also drop "rx" from rtl_set_rx_tx_config_registers(), since it does nothing with it already. Fixes: 3559d81e76bfe3803e89f2e04cf6ef7ab4f3aace ("r8169: simplify rtl_hw_start_8169") Cc: Heiner Kallweit <hkallweit1@gmail.com> Cc: David S. Miller <davem@davemloft.net> Cc: netdev@vger.kernel.org Cc: Realtek linux nic maintainers <nic_swsd@realtek.com> Signed-off-by: Azat Khuzhin <a3at.mail@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 0efa977c422d..ac306797590e 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -4522,7 +4522,7 @@ static void rtl8169_hw_reset(struct rtl8169_private *tp)
-static void rtl_set_rx_tx_config_registers(struct rtl8169_private *tp)
+static void rtl_set_tx_config_registers(struct rtl8169_private *tp)
/* Set DMA burst size and Interframe Gap Time */
RTL_W32(tp, TxConfig, (TX_DMA_BURST << TxDMAShift) |
@@ -4633,12 +4633,14 @@ static void rtl_hw_start(struct rtl8169_private *tp)
- rtl_set_rx_tx_config_registers(tp);
+ rtl_set_tx_config_registers(tp);
RTL_W8(tp, Cfg9346, Cfg9346_Lock);
/* Initially a 10 us delay. Turned it into a PCI commit. - FR */
RTL_R8(tp, IntrMask);
RTL_W8(tp, ChipCmd, CmdTxEnb | CmdRxEnb);
+ rtl_init_rxcfg(tp);
/* no early-rx interrupts */
RTL_W16(tp, MultiIntr, RTL_R16(tp, MultiIntr) & 0xf000);