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[BUG] WFI Panic when processing CTX_SAVE IPC #2123

@ranj063

Description

@ranj063

Describe the bug
Panic when processing CTX_SAVE IPC while trying to wait_for_interrupt with level 0 from the IPC task.

To Reproduce
Boot FW with PM enabled (thesofproject/linux#1523)

Reproduction Rate
100%

Expected behavior
No panic with WFI

Impact
When the panic happens, the FW sends the panic message to the host
and goes into an infinite loop while(1);
This doesnt seem to impact any usecase and the resume flow thereafter but the DSP is not really in D3 either.

Environment

  1. Branch name and commit hash of the 2 repositories: sof (firmware/topology) and linux (kernel driver).
  2. Name of the topology file
    • Topology: sof-byt-.tplg/sof-cht-.tplg
  3. Name of the platform(s) on which the bug is observed.
    • Platform: BYT/CHT

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BYTApplies to Baytrail platformP2Critical bugs or normal featuresbugSomething isn't working as expected

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