diff options
| author |   Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2010-11-23 10:42:22 -0800 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2011-03-13 18:23:42 -0700 |
| commit | d30b2a208108a0b0fdeae7006b8824d9be16ca96 (patch) | |
| tree | 43df86628f31b4ad46d82258c8d8a1a8e88ae625 /tools/perf/scripts/python/syscall-counts.py | |
| parent | xhci: Return a USB 3.0 hub descriptor for USB3 roothub. (diff) | |
| download | wireguard-linux-d30b2a208108a0b0fdeae7006b8824d9be16ca96.tar.xz wireguard-linux-d30b2a208108a0b0fdeae7006b8824d9be16ca96.zip | |
xhci: Limit roothub ports to 15 USB3 & 31 USB2 ports.
The USB core allocates a USB 2.0 roothub descriptor that has room for 31
(USB_MAXCHILDREN) ports' worth of DeviceRemovable and PortPwrCtrlMask
fields. Limit the number of USB 2.0 roothub ports accordingly. I don't
expect to run into this limitation ever, but this prevents a buffer
overflow issue in the roothub descriptor filling code.
Similarly, a USB 3.0 hub can only have 15 downstream ports, so limit the
USB 3.0 roothub to 15 USB 3.0 ports.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions