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| author | Zhuang Jin Can <[email protected]> | 2015-07-21 14:20:30 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2015-07-22 21:19:37 +0000 |
| commit | fac4271d1126c45ceaceb7f4a336317b771eb121 (patch) | |
| tree | 7ea059fe9f19fe19b0e262aaf316eb147cee14a5 /tools/perf/util/scripting-engines/trace-event-perl.c | |
| parent | xhci: report U3 when link is in resume state (diff) | |
| download | kernel-fac4271d1126c45ceaceb7f4a336317b771eb121.tar.gz kernel-fac4271d1126c45ceaceb7f4a336317b771eb121.zip | |
xhci: prevent bus_suspend if SS port resuming in phase 1
When the link is just waken, it's in Resume state, and driver sets PLS to
U0. This refers to Phase 1. Phase 2 refers to when the link has completed
the transition from Resume state to U0.
With the fix of xhci: report U3 when link is in resume state, it also
exposes an issue that usb3 roothub and controller can suspend right
after phase 1, and this causes a hard hang in controller.
To fix the issue, we need to prevent usb3 bus suspend if any port is
resuming in phase 1.
[merge separate USB2 and USB3 port resume checking to one -Mathias]
Cc: <[email protected]>
Signed-off-by: Zhuang Jin Can <[email protected]>
Signed-off-by: Mathias Nyman <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-perl.c')
0 files changed, 0 insertions, 0 deletions