From: Juerg Haefliger <juerg.haefliger@canonical.com>
To: netdev@vger.kernel.org, woojung.huh@microchip.com
Subject: lan78xx: /sys/class/net/eth0/carrier stuck at 1
Date: Wed, 21 Oct 2020 17:00:53 +0200 [thread overview]
Message-ID: <20201021170053.4832d1ad@gollum> (raw)
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Hi,
If the lan78xx driver is compiled into the kernel and the network cable is
plugged in at boot, /sys/class/net/eth0/carrier is stuck at 1 and doesn't
toggle if the cable is unplugged and replugged.
If the network cable is *not* plugged in at boot, all seems to work fine.
I.e., post-boot cable plugs and unplugs toggle the carrier flag.
Also, everything seems to work fine if the driver is compiled as a module.
There's an older ticket for the raspi kernel [1] but I've just tested this
with a 5.8 kernel on a Pi 3B+ and still see that behavior.
...Juerg
[1] https://github.com/raspberrypi/firmware/issues/1100
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next reply other threads:[~2020-10-21 15:01 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-21 15:00 Juerg Haefliger [this message]
2020-10-21 19:35 ` lan78xx: /sys/class/net/eth0/carrier stuck at 1 Andrew Lunn
2020-10-23 6:29 ` Juerg Haefliger
2020-10-23 13:05 ` Andrew Lunn
2020-11-03 12:47 ` Juerg Haefliger
2020-11-03 15:27 ` Andrew Lunn
2020-11-06 8:56 ` Juerg Haefliger
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