Comment 12 for bug 1984103

Verification done on jammy (on a slightly different setup):
root@s1lp15:~# uname -a
Linux s1lp15 5.15.0-27-generic #28-Ubuntu SMP Thu Apr 14 04:55:23 UTC 2022 s390x s390x s390x GNU/Linux
root@s1lp15:~# ethtool encc000 | grep Duplex
 Duplex: Full
root@s1lp15:~# grep qcrdinfo /sys/kernel/debug/s390dbf/qeth*/hex_ascii | wc -l
3
root@s1lp15:~# grep qcrdinfo /sys/kernel/debug/s390dbf/qeth*/hex_ascii
/sys/kernel/debug/s390dbf/qeth_card_0.0.c000/hex_ascii:00 01664021373:134002 2 - 0001 000003ff81066676 71 63 72 64 69 6e 66 6f | qcrdinfo
/sys/kernel/debug/s390dbf/qeth_card_0.0.c000/hex_ascii:00 01664021384:308308 2 - 0007 000003ff81066676 71 63 72 64 69 6e 66 6f | qcrdinfo
/sys/kernel/debug/s390dbf/qeth_card_0.0.c000/hex_ascii:00 01664021384:308804 2 - 0007 000003ff81066676 71 63 72 64 69 6e 66 6f | qcrdinfo
root@s1lp15:~# ethtool encc000
Settings for encc000:
 Supported ports: [ FIBRE ]
 Supported link modes: 10000baseSR/Full
 Supported pause frame use: No
 Supports auto-negotiation: Yes
 Supported FEC modes: Not reported
 Advertised link modes: 10000baseSR/Full
 Advertised pause frame use: No
 Advertised auto-negotiation: Yes
 Advertised FEC modes: Not reported
 Speed: 10000Mb/s
 Duplex: Full
 Auto-negotiation: on
 Port: FIBRE
 PHYAD: 0
 Transceiver: internal
 Link detected: yes
(adjusting tags accordingly)