diff options
Diffstat (limited to 'drivers/thunderbolt/xdomain.c')
| -rw-r--r-- | drivers/thunderbolt/xdomain.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c index 8abb4e843085..db8bece63327 100644 --- a/drivers/thunderbolt/xdomain.c +++ b/drivers/thunderbolt/xdomain.c @@ -13,6 +13,7 @@ #include <linux/device.h> #include <linux/kmod.h> #include <linux/module.h> +#include <linux/pm_runtime.h> #include <linux/utsname.h> #include <linux/uuid.h> #include <linux/workqueue.h> @@ -1129,6 +1130,14 @@ struct tb_xdomain *tb_xdomain_alloc(struct tb *tb, struct device *parent, xd->dev.groups = xdomain_attr_groups; dev_set_name(&xd->dev, "%u-%llx", tb->index, route); + /* + * This keeps the DMA powered on as long as we have active + * connection to another host. + */ + pm_runtime_set_active(&xd->dev); + pm_runtime_get_noresume(&xd->dev); + pm_runtime_enable(&xd->dev); + return xd; err_free_local_uuid: @@ -1174,6 +1183,15 @@ void tb_xdomain_remove(struct tb_xdomain *xd) device_for_each_child_reverse(&xd->dev, xd, unregister_service); + /* + * Undo runtime PM here explicitly because it is possible that + * the XDomain was never added to the bus and thus device_del() + * is not called for it (device_del() would handle this otherwise). + */ + pm_runtime_disable(&xd->dev); + pm_runtime_put_noidle(&xd->dev); + pm_runtime_set_suspended(&xd->dev); + if (!device_is_registered(&xd->dev)) put_device(&xd->dev); else |