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Diffstat (limited to 'drivers/usb/core/hub.c')
-rw-r--r--drivers/usb/core/hub.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 090469ebfcff..229a73f64304 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1691,8 +1691,19 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id)
1691 */ 1691 */
1692 pm_runtime_set_autosuspend_delay(&hdev->dev, 0); 1692 pm_runtime_set_autosuspend_delay(&hdev->dev, 0);
1693 1693
1694 /* Hubs have proper suspend/resume support. */ 1694 /*
1695 usb_enable_autosuspend(hdev); 1695 * Hubs have proper suspend/resume support, except for root hubs
1696 * where the controller driver doesn't have bus_suspend and
1697 * bus_resume methods.
1698 */
1699 if (hdev->parent) { /* normal device */
1700 usb_enable_autosuspend(hdev);
1701 } else { /* root hub */
1702 const struct hc_driver *drv = bus_to_hcd(hdev->bus)->driver;
1703
1704 if (drv->bus_suspend && drv->bus_resume)
1705 usb_enable_autosuspend(hdev);
1706 }
1696 1707
1697 if (hdev->level == MAX_TOPO_LEVEL) { 1708 if (hdev->level == MAX_TOPO_LEVEL) {
1698 dev_err(&intf->dev, 1709 dev_err(&intf->dev,