USB 3.0 devices have a slightly different suspend sequence than USB
2.0/1.1 devices. There isn't support for USB 3.0 device suspend yet, so
make khubd leave autosuspend disabled for USB 3.0 hubs.
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
---
drivers/usb/core/hub.c | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 8a5ea2b..aca1cce 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1288,8 +1288,13 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id)
desc = intf->cur_altsetting;
hdev = interface_to_usbdev(intf);
- /* Hubs have proper suspend/resume support */
- usb_enable_autosuspend(hdev);
+ /* Hubs have proper suspend/resume support. USB 3.0 device suspend
+ * is different than USB 2.0/1.1 device suspend, and unfortunately we
+ * don't support it yet. So leave autosuspend disabled that for
+ * USB 3.0 hubs for now.
+ */
+ if (!hub_is_superspeed(hdev))
+ usb_enable_autosuspend(hdev);
if (hdev->level == MAX_TOPO_LEVEL) {
dev_err(&intf->dev,
--
1.6.3.3
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