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authorMika Westerberg <mika.westerberg@linux.intel.com>2020-12-10 15:57:10 +0300
committerMika Westerberg <mika.westerberg@linux.intel.com>2021-03-08 14:22:42 +0300
commitc94732bda079ee66b5c3904cbb628d0cb218ab39 (patch)
tree02efbaf00c842914fff9581545aeb56259699326 /drivers/thunderbolt/tb.c
parent781e14eaa7d168dc07d2a2eea5c55831a5bb46f3 (diff)
downloadlinux-c94732bda079ee66b5c3904cbb628d0cb218ab39.tar.xz
thunderbolt: Increase runtime PM reference count on DP tunnel discovery
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@vger.kernel.org Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/tb.c')
-rw-r--r--drivers/thunderbolt/tb.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 1f000ac1728b..c348b1fc0efc 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -138,6 +138,10 @@ static void tb_discover_tunnels(struct tb_switch *sw)
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);