Re: [BUG] mach-msm/msm_vibrator.c - very long vibration if CPU suspends

[David Brown <davidb@codeaurora.org>]

On Wed, Sep 04, 2013 at 05:24:50PM -0400, abhilash jindal wrote:
>msm_vibrator.c uses hrtimer to switch off the phone vibration as follows-
>
>hrtimer_start(&vibe_timer, ktime_set(value / 1000, (value % 1000) *
>1000000), HRTIMER_MODE_REL);
>
>However, hrtimer does not get fired after the CPU suspends. Hence, if
>the CPU suspends before the timer gets fired, the phone continues
>vibrating until the next time when CPU wakes up causing unnecessary
>battery drain (which can be as long as 15 minutes).
>
>IMHO, one way to fix it would be to replace hrtimer by android alarm timer.

It looks like this file exists only in the codeaurora.org MSM tree,
and not in the mainline kernel.  The first thing I'd mention is that
if you are an MSM customer, you'll be much better off reporting this
through the customer support chain.

Otherwise, I can forward this information internally.  I'm not sure if
they'll be any response, since it doesn't appear to be used in any
recent targets.

David

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