Breno Leitao 95af085073 netdevsim: set the carrier when the device goes up ...

[ Upstream commit 1a8fed52f7 ]

Bringing a linked netdevsim device down and then up causes communication
failure because both interfaces lack carrier. Basically a ifdown/ifup on
the interface make the link broken.

Commit 3762ec05a9 ("netdevsim: add NAPI support") added supported
for NAPI, calling netif_carrier_off() in nsim_stop(). This patch
re-enables the carrier symmetrically on nsim_open(), in case the device
is linked and the peer is up.

Signed-off-by: Breno Leitao <leitao@debian.org>
Fixes: 3762ec05a9 ("netdevsim: add NAPI support")
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20251014-netdevsim_fix-v2-1-53b40590dae1@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-10-23 16:20:31 +02:00

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bpf.c

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bus.c

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dev.c

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ethtool.c

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fib.c

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health.c

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hwstats.c

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ipsec.c

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macsec.c

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Makefile

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netdev.c

netdevsim: set the carrier when the device goes up

2025-10-23 16:20:31 +02:00

netdevsim.h

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psample.c

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udp_tunnels.c

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