6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Dumazet edumazet@google.com
[ Upstream commit a3b3d2dc389568a77d0e25da17203e3616218e93 ]
A synchronize_rcu() was added by mistake in commit c5a759117210 ("net/hsr: Use list_head (and rcu) instead of array for slave devices.")
RCU does not mandate to observe a grace period after list_add_tail_rcu().
Signed-off-by: Eric Dumazet edumazet@google.com Reviewed-by: Simon Horman horms@kernel.org Link: https://patch.msgid.link/20250107144701.503884-1-edumazet@google.com Signed-off-by: Paolo Abeni pabeni@redhat.com Stable-dep-of: 30296ac76426 ("net: dsa: xrs700x: reject unsupported HSR configurations") Signed-off-by: Sasha Levin sashal@kernel.org --- net/hsr/hsr_slave.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/net/hsr/hsr_slave.c b/net/hsr/hsr_slave.c index 01762525c9456..9ac7cf0835118 100644 --- a/net/hsr/hsr_slave.c +++ b/net/hsr/hsr_slave.c @@ -210,7 +210,6 @@ int hsr_add_port(struct hsr_priv *hsr, struct net_device *dev, }
list_add_tail_rcu(&port->port_list, &hsr->ports); - synchronize_rcu();
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); netdev_update_features(master->dev);