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path: root/drivers/thunderbolt/icm.c
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Diffstat (limited to 'drivers/thunderbolt/icm.c')
-rw-r--r--drivers/thunderbolt/icm.c54
1 files changed, 53 insertions, 1 deletions
diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c
index f1c10378fa3e..40a8960b9a7e 100644
--- a/drivers/thunderbolt/icm.c
+++ b/drivers/thunderbolt/icm.c
@@ -484,6 +484,7 @@ static void add_switch(struct tb_switch *parent_sw, u64 route,
sw->authorized = authorized;
sw->security_level = security_level;
sw->boot = boot;
+ init_completion(&sw->rpm_complete);
vss = parse_intel_vss(ep_name, ep_name_size);
if (vss)
@@ -523,6 +524,9 @@ static void update_switch(struct tb_switch *parent_sw, struct tb_switch *sw,
/* This switch still exists */
sw->is_unplugged = false;
+
+ /* Runtime resume is now complete */
+ complete(&sw->rpm_complete);
}
static void remove_switch(struct tb_switch *sw)
@@ -1770,6 +1774,32 @@ static void icm_unplug_children(struct tb_switch *sw)
}
}
+static int complete_rpm(struct device *dev, void *data)
+{
+ struct tb_switch *sw = tb_to_switch(dev);
+
+ if (sw)
+ complete(&sw->rpm_complete);
+ return 0;
+}
+
+static void remove_unplugged_switch(struct tb_switch *sw)
+{
+ pm_runtime_get_sync(sw->dev.parent);
+
+ /*
+ * Signal this and switches below for rpm_complete because
+ * tb_switch_remove() calls pm_runtime_get_sync() that then waits
+ * for it.
+ */
+ complete_rpm(&sw->dev, NULL);
+ bus_for_each_dev(&tb_bus_type, &sw->dev, NULL, complete_rpm);
+ tb_switch_remove(sw);
+
+ pm_runtime_mark_last_busy(sw->dev.parent);
+ pm_runtime_put_autosuspend(sw->dev.parent);
+}
+
static void icm_free_unplugged_children(struct tb_switch *sw)
{
unsigned int i;
@@ -1782,7 +1812,7 @@ static void icm_free_unplugged_children(struct tb_switch *sw)
port->xdomain = NULL;
} else if (tb_port_has_remote(port)) {
if (port->remote->sw->is_unplugged) {
- tb_switch_remove(port->remote->sw);
+ remove_unplugged_switch(port->remote->sw);
port->remote = NULL;
} else {
icm_free_unplugged_children(port->remote->sw);
@@ -1831,6 +1861,24 @@ static int icm_runtime_suspend(struct tb *tb)
return 0;
}
+static int icm_runtime_suspend_switch(struct tb_switch *sw)
+{
+ if (tb_route(sw))
+ reinit_completion(&sw->rpm_complete);
+ return 0;
+}
+
+static int icm_runtime_resume_switch(struct tb_switch *sw)
+{
+ if (tb_route(sw)) {
+ if (!wait_for_completion_timeout(&sw->rpm_complete,
+ msecs_to_jiffies(500))) {
+ dev_dbg(&sw->dev, "runtime resuming timed out\n");
+ }
+ }
+ return 0;
+}
+
static int icm_runtime_resume(struct tb *tb)
{
/*
@@ -1910,6 +1958,8 @@ static const struct tb_cm_ops icm_ar_ops = {
.complete = icm_complete,
.runtime_suspend = icm_runtime_suspend,
.runtime_resume = icm_runtime_resume,
+ .runtime_suspend_switch = icm_runtime_suspend_switch,
+ .runtime_resume_switch = icm_runtime_resume_switch,
.handle_event = icm_handle_event,
.get_boot_acl = icm_ar_get_boot_acl,
.set_boot_acl = icm_ar_set_boot_acl,
@@ -1930,6 +1980,8 @@ static const struct tb_cm_ops icm_tr_ops = {
.complete = icm_complete,
.runtime_suspend = icm_runtime_suspend,
.runtime_resume = icm_runtime_resume,
+ .runtime_suspend_switch = icm_runtime_suspend_switch,
+ .runtime_resume_switch = icm_runtime_resume_switch,
.handle_event = icm_handle_event,
.get_boot_acl = icm_ar_get_boot_acl,
.set_boot_acl = icm_ar_set_boot_acl,