diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-18 15:57:31 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-18 15:57:31 -0700 |
| commit | 665ab0f3c8b8f86bb77b25285ac93870c7054d63 (patch) | |
| tree | c7d12c3559982eb3fb1847438d4b45ce034851e5 /drivers/usb/core/hub.c | |
| parent | bf03f65b7967df5807ddef7b99f8a41d4c94fc70 (diff) | |
| parent | e816b57a337ea3b755de72bec38c10c864f23015 (diff) | |
Merge 3.4-rc3 into tty-next
This allows us to pick up some changes needed for other serial patches.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/core/hub.c')
| -rw-r--r-- | drivers/usb/core/hub.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 28664eb7f555..a2aa9d652c67 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -3163,6 +3163,22 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1, if (retval) goto fail; + /* + * Some superspeed devices have finished the link training process + * and attached to a superspeed hub port, but the device descriptor + * got from those devices show they aren't superspeed devices. Warm + * reset the port attached by the devices can fix them. + */ + if ((udev->speed == USB_SPEED_SUPER) && + (le16_to_cpu(udev->descriptor.bcdUSB) < 0x0300)) { + dev_err(&udev->dev, "got a wrong device descriptor, " + "warm reset device\n"); + hub_port_reset(hub, port1, udev, + HUB_BH_RESET_TIME, true); + retval = -EINVAL; + goto fail; + } + if (udev->descriptor.bMaxPacketSize0 == 0xff || udev->speed == USB_SPEED_SUPER) i = 512; |