tree 9221e0957ef50b03c2b1253862764519c16292de
parent 090a4646d296e47cf9327b3ca209d1ccb4d5ec6b
author Rajat Jain <rajatja@google.com> 1518076008 -0800
committer ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> 1518560666 +0000

power: powerd_suspend: Issue hcitool command only on Intel BT platforms

Apparently, the Marvell bluetooth controller *sometimes* fails to
respond to the command used to enable / disable mode change HCI event.
The issue is rarely reproduced at random. So:

* Issue the command only on platforms that have Intel BT controllers.
* Timeout hcitool command at 2 seconds in order to ensure that a
  bad controller cannot take forever to respond. The timeout of 2 secs
  is taken from HCI_CMD_TIMEOUT in kernel.

BUG=chromium:803272
TEST=Suspend / resume on Kevin does not issue the hcitool command.
     Suspend resume on a Soraka issues the hcitool command.
     Faking a hang (using sleep command instead of hcitool) kills the
     command and logs a message)

Change-Id: I399f2ca794e135b703cbc0d46d15039649e30ab4
Reviewed-on: https://chromium-review.googlesource.com/915341
Reviewed-by: Dan Erat <derat@chromium.org>
Tested-by: Rajat Jain <rajatja@chromium.org>
Commit-Queue: Rajat Jain <rajatja@chromium.org>
Trybot-Ready: Rajat Jain <rajatja@chromium.org>