Driver issue when using with r8157 / Wavlink 5G adapter #52
Description
When using Wavlink / r8157 adapter with Ubuntu 24.04.3 with Raspberry Pi5 with Linux kernel 6.8, the following is observed:
[ 36.081296] usb 5-1: New USB device found, idVendor=0bda, idProduct=8157, bcdDevice=30.00
[ 36.081310] usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=7
[ 36.081313] usb 5-1: Product: USB 10/100/1G/2.5G/5G LAN
[ 36.081316] usb 5-1: Manufacturer: Realtek
[ 36.081318] usb 5-1: SerialNumber: 0003803F5DD27C25
[ 36.343563] cdc_ncm 5-1:2.0: MAC-Address: 80:3f:5d:d2:7c:25
[ 36.343579] cdc_ncm 5-1:2.0: setting rx_max = 16384
[ 36.344186] cdc_ncm 5-1:2.0: setting tx_max = 16384
[ 36.345190] cdc_ncm 5-1:2.0 eth1: register 'cdc_ncm' at usb-xhci-hcd.1-1, CDC NCM (NO ZLP), 80:3f:5d:d2:7c:25
[ 36.417989] cdc_ncm 5-1:2.0 eth1: unregister 'cdc_ncm' usb-xhci-hcd.1-1, CDC NCM (NO ZLP)
[ 40.603217] r8152 5-1:1.0 eth1: This product is covered by one or more of the following patents:
US6,570,884, US6,115,776, and US6,327,625.
[ 85.246365] r8152 5-1:1.0 enx803f5dd27c25: Tx status -32
[ 85.247028] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 85.247160] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 85.366595] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 85.366785] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 85.366930] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 85.367071] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 85.367211] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 85.501587] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 85.593515] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 338.140325] net_ratelimit: 31 callbacks suppressed
[ 338.140349] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 338.142344] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 338.179297] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 338.187164] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 338.207491] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 338.329228] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 338.452638] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 338.476556] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 338.502683] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 338.520114] r8152 5-1:1.0 enx803f5dd27c25: Tx status -71
[ 343.244537] net_ratelimit: 51 callbacks suppressed
The nic disconnected after every 30-odd seconds.
However, the same driver after upgrading to Ubuntu 25.04 on RPi5, with Linux kernel 6.14 (6.14.0-1012-raspi aarch64) seems to be working fine (uptime of more than a day) and working at full speed of 5000Mb/s.
root@cloudpi:/home/rohit# ethtool -i enx803f5dd27c25
driver: r8152
version: v2.20.1 (2025/05/13)
firmware-version:
expansion-rom-version:
bus-info: usb-xhci-hcd.0-1
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no
root@cloudpi:/home/rohit# ethtool enx803f5dd27c25
Settings for enx803f5dd27c25:
Supported ports: [ MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
2500baseT/Full
5000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
2500baseT/Full
5000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
10000baseT/Full
2500baseT/Full
5000baseT/Full
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 5000Mb/s
Duplex: Full
Auto-negotiation: on
Port: MII
PHYAD: 20
Transceiver: internal
Supports Wake-on: pumbg
Wake-on: d
Current message level: 0x00007fff (32767)
drv probe link timer ifdown ifup rx_err tx_err tx_queued intr tx_done rx_status pktdata hw wol
Link detected: yes
The only additional workaround I had to use was to turn off sg:
root@cloudpi:/home/rohit# cat /etc/networkd-dispatcher/routable.d/post-up.sh
#!/bin/sh
/usr/sbin/ethtool -K enx803f5dd27c25 sg off
Does the drive need anything to manage RX/TX buffers better out of the box?
root@cloudpi:/home/rohit# ethtool -g enx803f5dd27c25
Ring parameters for enx803f5dd27c25:
Pre-set maximums:
RX: 4096
RX Mini: n/a
RX Jumbo: n/a
TX: n/a
TX push buff len: n/a
Current hardware settings:
RX: 100
RX Mini: n/a
RX Jumbo: n/a
TX: n/a
RX Buf Len: n/a
CQE Size: n/a
TX Push: off
RX Push: off
TX push buff len: n/a
TCP data split: n/a