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Fix ipc timeout caused due to incorrect task scheduling #709

Merged
merged 1 commit into from
Dec 17, 2018
Merged

Fix ipc timeout caused due to incorrect task scheduling #709

merged 1 commit into from
Dec 17, 2018

Commits on Dec 13, 2018

  1. scheduler: allow RUNNING tasks to be re-scheduled in the future. 

    Because of a race condition between when the DONE interrupt
is sent to the host and when the previous ipc task's
state is updated to COMPLETED, new ipc's from the host
could end up not being scheduled. This leads to ipc
time outs on the host.

In order to prevent this, this patch introduces a new task state
called PENDING which is assigned to the task when it is picked
as the next task to be run. The state is then updated to running
when the task function is executed. This way when a ipc task
comes in, a RUNNING task could get scheduled again and assigned
the PENDING state to ensure that it doesnt get missed.

Signed-off-by: Ranjani Sridharan <[email protected]>
    @ranj063
    ranj063 committed Dec 13, 2018
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