Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-10-31 09:11:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

USB: Disable auto-suspend for USB 3.0 hubs.

Browse Source 
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.  Make sure that
USB 3.0 roothubs still have autosuspend enabled, since that path in the
xHCI driver works fine.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
This commit is contained in:
Sarah Sharp 2010-12-30 13:27:36 -08:00
parent 131dec344d
commit 0c9ffe0f62
1 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/usb/core/hub.c
View File

@ -1290,8 +1290,14 @@ 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 from USB 2.0/1.1 device suspend, and unfortunately we
* don't support it yet. So leave autosuspend disabled for USB 3.0
* external hubs for now. Enable autosuspend for USB 3.0 roothubs,
* since that isn't a "real" hub.
*/
if (!hub_is_superspeed(hdev) || !hdev->parent)
usb_enable_autosuspend(hdev);
if (hdev->level == MAX_TOPO_LEVEL) {
dev_err(&intf->dev,