This is a note to let you know that I've just added the patch titled net: bridge: mrp: Update ring transitions. to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-bridge-mrp-update-ring-transitions.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 168907a59285c417beee0c7fbeedab5d7999c4ab Author: Horatiu Vultur <horatiu.vultur@xxxxxxxxxxxxx> Date: Fri Jun 4 12:37:47 2021 +0200 net: bridge: mrp: Update ring transitions. [ Upstream commit fcb34635854a5a5814227628867ea914a9805384 ] According to the standard IEC 62439-2, the number of transitions needs to be counted for each transition 'between' ring state open and ring state closed and not from open state to closed state. Therefore fix this for both ring and interconnect ring. Signed-off-by: Horatiu Vultur <horatiu.vultur@xxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/net/bridge/br_mrp.c b/net/bridge/br_mrp.c index d1336a7ad7ff..3259f5480127 100644 --- a/net/bridge/br_mrp.c +++ b/net/bridge/br_mrp.c @@ -607,8 +607,7 @@ int br_mrp_set_ring_state(struct net_bridge *br, if (!mrp) return -EINVAL; - if (mrp->ring_state == BR_MRP_RING_STATE_CLOSED && - state->ring_state != BR_MRP_RING_STATE_CLOSED) + if (mrp->ring_state != state->ring_state) mrp->ring_transitions++; mrp->ring_state = state->ring_state; @@ -690,8 +689,7 @@ int br_mrp_set_in_state(struct net_bridge *br, struct br_mrp_in_state *state) if (!mrp) return -EINVAL; - if (mrp->in_state == BR_MRP_IN_STATE_CLOSED && - state->in_state != BR_MRP_IN_STATE_CLOSED) + if (mrp->in_state != state->in_state) mrp->in_transitions++; mrp->in_state = state->in_state;