This is a note to let you know that I've just added the patch titled
thunderbolt: Increase runtime PM reference count on DP tunnel discovery
to the 5.11-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:
thunderbolt-increase-runtime-pm-reference-count-on-dp-tunnel-discovery.patch
and it can be found in the queue-5.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c94732bda079ee66b5c3904cbb628d0cb218ab39 Mon Sep 17 00:00:00 2001
From: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Date: Thu, 10 Dec 2020 14:57:10 +0200
Subject: thunderbolt: Increase runtime PM reference count on DP tunnel discovery
From: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
commit c94732bda079ee66b5c3904cbb628d0cb218ab39 upstream.
If the driver is unbound and then bound back it goes over the topology
and figure out the existing tunnels. However, if it finds DP tunnel it
should make sure the domain does not runtime suspend as otherwise it
will tear down the DP tunnel unexpectedly.
Fixes: 6ac6faee5d7d ("thunderbolt: Add runtime PM for Software CM")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/thunderbolt/tb.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -138,6 +138,10 @@ static void tb_discover_tunnels(struct t
parent->boot = true;
parent = tb_switch_parent(parent);
}
+ } else if (tb_tunnel_is_dp(tunnel)) {
+ /* Keep the domain from powering down */
+ pm_runtime_get_sync(&tunnel->src_port->sw->dev);
+ pm_runtime_get_sync(&tunnel->dst_port->sw->dev);
}
list_add_tail(&tunnel->list, &tcm->tunnel_list);
Patches currently in stable-queue which might be from mika.westerberg@xxxxxxxxxxxxxxx are
queue-5.11/thunderbolt-increase-runtime-pm-reference-count-on-dp-tunnel-discovery.patch
queue-5.11/thunderbolt-initialize-hopid-idas-in-tb_switch_alloc.patch
