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Date: Wed, 15 Jan 2020 09:27:35 -0800 From: Florian Fainelli <f.fainelli@...il.com> To: Norbert Lange <nolange79@...il.com>, Richard Cochran <richardcochran@...il.com>, netdev@...r.kernel.org Subject: Re: PROBLEM: kernel crash when unbinding igb device with 4.19.94 On 1/15/20 9:10 AM, Norbert Lange wrote: > Hello, > > The commit "ptp: fix the race between the release of ptp_clock and > cdev" (#0393b8720128) introduced a bad regression, atleast in the 4.19 > branch. > > I have a Intel I210 card in the system (actually 4 of them if that's > relevant), system is a custom buildroot so I dont have all tools to > create the information, but given that reverting the commit fixed the > issue I think its narrowed down enough. > unbinding the driver from one device will always trigger a crash. > > I use the xenomai ipipe-patch on top, if required I could try with a > naked linux (would cost me some time to do). > I ran various versions from 4.14 up to 4.19.89, and 4.19.89 with above > patch reversed, all which did not have this issue. This patch should fix the problem: https://lore.kernel.org/netdev/20200113130009.2938-1-vdronov@redhat.com/ and should soon reach stable kernels if it has not already. -- Florian
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