[PATCH 04/12] thunderbolt: Keep the parent runtime resumed for a while on device disconnect

[Mika Westerberg]

When doing device firmware upgrade the device will disconnect for a
while and then reconnect back. Keep the parent device (and the whole
domain) powered for a while so we don't need to runtime resume
immediately when the device is connected back after the device upgrade
completes.

Signed-off-by: Mika Westerberg <mika.westerb...@linux.intel.com>
---
 drivers/thunderbolt/icm.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c
index beee6e6b8b6e..635b949fb1d6 100644
--- a/drivers/thunderbolt/icm.c
+++ b/drivers/thunderbolt/icm.c
@@ -870,7 +870,13 @@ icm_fr_device_disconnected(struct tb *tb, const struct 
icm_pkg_header *hdr)
                return;
        }
 
+       pm_runtime_get_sync(sw->dev.parent);
+
        remove_switch(sw);
+
+       pm_runtime_mark_last_busy(sw->dev.parent);
+       pm_runtime_put_autosuspend(sw->dev.parent);
+
        tb_switch_put(sw);
 }
 
@@ -1280,8 +1286,13 @@ icm_tr_device_disconnected(struct tb *tb, const struct 
icm_pkg_header *hdr)
                tb_warn(tb, "no switch exists at %llx, ignoring\n", route);
                return;
        }
+       pm_runtime_get_sync(sw->dev.parent);
 
        remove_switch(sw);
+
+       pm_runtime_mark_last_busy(sw->dev.parent);
+       pm_runtime_put_autosuspend(sw->dev.parent);
+
        tb_switch_put(sw);
 }
 
-- 
2.29.2