hsr: use rtnl lock when iterating over ports

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[ Upstream commit 8884c69399 ]

hsr_for_each_port is called in many places without holding the RCU read
lock, this may trigger warnings on debug kernels. Most of the callers
are actually hold rtnl lock. So add a new helper hsr_for_each_port_rtnl
to allow callers in suitable contexts to iterate ports safely without
explicit RCU locking.

This patch only fixed the callers that is hold rtnl lock. Other caller
issues will be fixed in later patches.

Fixes: c5a7591172 ("net/hsr: Use list_head (and rcu) instead of array for slave devices.")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250905091533.377443-2-liuhangbin@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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This commit is contained in:

Hangbin Liu 2025-09-05 09:15:31 +00:00 • committed by Greg Kroah-Hartman

parent 1100242709

commit cedfcd09a3

3 changed files with 13 additions and 10 deletions

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18

net/hsr/hsr_device.c

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2

net/hsr/hsr_main.c

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3

net/hsr/hsr_main.h

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