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[76.14.218.44]) by smtp.gmail.com with ESMTPSA id kk7sm2706279pjb.11.2021.04.21.09.49.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Apr 2021 09:49:18 -0700 (PDT) Date: Wed, 21 Apr 2021 09:49:10 -0700 From: Stephen Hemminger To: linux-usb@vger.kernel.org, netdev@vger.kernel.org Subject: Fw: [Bug 212741] New: unregister_netdevice: waiting for enp0s20f0u1 to become free. Message-ID: <20210421094910.2ccf58b3@hermes.local> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org 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 -- You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.