diff options
| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2016-10-20 18:09:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-12 11:22:44 +0100 |
| commit | b4b404b99177c8b85d4d34eb51382fa754ac25b6 (patch) | |
| tree | 7dd750a31703e7d54d3627905ba4a92e59904710 /tools/perf/scripts/python/bin | |
| parent | e224b8b7215fbaf0b7ce70dded685f635412369a (diff) | |
xhci: workaround for hosts missing CAS bit
commit 346e99736c3ce328fd42d678343b70243aca5f36 upstream.
If a device is unplugged and replugged during Sx system suspend
some Intel xHC hosts will overwrite the CAS (Cold attach status) flag
and no device connection is noticed in resume.
A device in this state can be identified in resume if its link state
is in polling or compliance mode, and the current connect status is 0.
A device in this state needs to be warm reset.
Intel 100/c230 series PCH specification update Doc #332692-006 Errata #8
Observed on Cherryview and Apollolake as they go into compliance mode
if LFPS times out during polling, and re-plugged devices are not
discovered at resume.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/bin')
0 files changed, 0 insertions, 0 deletions