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| author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2012-05-15 16:58:45 -0700 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2012-05-18 15:41:53 -0700 |
| commit | 448b6eb1e04cddc418d4b780ae19ca8cdb42d110 (patch) | |
| tree | e354c9392df245183746a1c075b2bb95979a2156 | |
| parent | 797b0ca5e6283b4cc0bdeeb0e5915f21522ba85f (diff) | |
| download | blackbird-obmc-linux-448b6eb1e04cddc418d4b780ae19ca8cdb42d110.tar.gz blackbird-obmc-linux-448b6eb1e04cddc418d4b780ae19ca8cdb42d110.zip | |
USB: Make sure to fetch the BOS desc for roothubs.
The BOS descriptor is normally fetched and stored in the usb_device->bos
during enumeration. USB 3.0 roothubs don't undergo enumeration, but we
need them to have a BOS descriptor, since each xHCI host has a different
U1 and U2 exit latency. Make sure to fetch the BOS descriptor for USB
3.0 roothubs. It will be freed when the roothub usb_device is released.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Andiry Xu <andiry.xu@amd.com>
| -rw-r--r-- | drivers/usb/core/hcd.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 0cd2daacacbe..190b1ec7bdcb 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -997,6 +997,15 @@ static int register_root_hub(struct usb_hcd *hcd) dev_name(&usb_dev->dev), retval); return (retval < 0) ? retval : -EMSGSIZE; } + if (usb_dev->speed == USB_SPEED_SUPER) { + retval = usb_get_bos_descriptor(usb_dev); + if (retval < 0) { + mutex_unlock(&usb_bus_list_lock); + dev_dbg(parent_dev, "can't read %s bos descriptor %d\n", + dev_name(&usb_dev->dev), retval); + return retval; + } + } retval = usb_new_device (usb_dev); if (retval) { |
