* Fw: [Bug 212741] New: unregister_netdevice: waiting for enp0s20f0u1 to become free.
@ 2021-04-21 16:49 Stephen Hemminger
0 siblings, 0 replies; only message in thread
From: Stephen Hemminger @ 2021-04-21 16:49 UTC (permalink / raw)
To: linux-usb, netdev
Looks like a USB driver network device ref count bug.
Begin forwarded message:
Date: Wed, 21 Apr 2021 08:39:38 +0000
From: bugzilla-daemon@bugzilla.kernel.org
To: stephen@networkplumber.org
Subject: [Bug 212741] New: unregister_netdevice: waiting for enp0s20f0u1 to become free.
https://bugzilla.kernel.org/show_bug.cgi?id=212741
Bug ID: 212741
Summary: unregister_netdevice: waiting for enp0s20f0u1 to
become free.
Product: Networking
Version: 2.5
Kernel Version: 5.11.14
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
Assignee: stephen@networkplumber.org
Reporter: dexter+kernelbugzilla@beetjevreemd.nl
Regression: No
This problem exists for years by now, I could work around it until now.
Somewhere around kernel 4.9 ish this problem started to appear.
I have an USB network adapter and whenever the connection is severed (because I
touch the cable, USB reset, sleep, cosmic rays) the kernel starts logging below
message every 10~ish seconds. The usagecount is always different, but increases
with uptime. I can replicate this on all my laptops and workstations.
My setup is quite straigtforward, just (networkmanager)DHCP and a wireguard
VPN. Running Fedora 33 (but exists since like 26 or so).
[ 992.787930] unregister_netdevice: waiting for enp0s20f0u1 to become free.
Usage count = 8113
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