The good news is that on the mainline 7.1.2 the issue seems to vanish
$ cat top_mainline7.1.2.log
top - 20:02:00 up 2 min, 1 user, load average: 2.22, 1.29, 0.51
Tasks: 459 total, 1 running, 458 sleeping, 0 stopped, 0 zombie
%Cpu(s): 1.6 us, 1.6 sy, 0.0 ni, 96.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 30208.8 total, 22534.3 free, 2391.9 used, 5796.6 buff/cache
MiB Swap: 8192.0 total, 8192.0 free, 0.0 used. 27816.9 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
13090 mastier 20 0 15916 5832 3748 R 8.3 0.0 0:00.03 top
1 root 20 0 28632 19276 11184 S 0.0 0.1 0:02.90 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:00.00 pool_wo+
4 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kworker+
5 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kworker+
6 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kworker+
7 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kworker+
8 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kworker+
9 root 20 0 0 0 0 I 0.0 0.0 0:00.01 kworker+
10 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kworker+
11 root 20 0 0 0 0 I 0.0 0.0 0:00.00 kworker+
12 root 20 0 0 0 0 I 0.0 0.0 0:00.71 kworker+
and yes, the driver is loaded
$ modinfo nxp_nci
filename:
/lib/modules/7.1.2-070102-generic/kernel/drivers/nfc/nxp-nci/nxp-nci.ko.zst
author: Clément Perrochaud <[email protected]>
description: NXP NCI NFC driver
license: GPL
srcversion: A6B63AF680B55895A7AB0A5
depends: nfc,nci
intree: Y
name: nxp_nci
retpoline: Y
vermagic: 7.1.2-070102-generic SMP preempt mod_unload modversions
...
<CUT>
** Attachment added: "kernel_lp2158286_mainline7.1.2.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2158286/+attachment/5979766/+files/kernel_lp2158286_mainline7.1.2.log
** Changed in: linux (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/2158286
Title:
NFC driver on Thinkpad T14 AMD gen4 causes a lot interrupts
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