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[BUG] [CNL] kmod-load-unload failing due to suspected runtime PM imbalance #2535
Description
A weekly test on CNL / Mantis with kernel 8290bd6 ("travis: replace SHA_MAIN/PR hacks with ${TRAVIS_COMMIT_RANGE/.../..}") and firmware db09bb8 ("dcblock: fix reset handler") failed a kernel loading-unloading test on iteration 12 because the DSP failed to suspend after 15 seconds of waiting. It is strange, that it failed that way after 11 successful iterations, has to be investigated further. The kernel log was clean.
Update: after a reproduction and a careful kernel log investigation an error has been located:
[ 8077.342096] [3284] sof-audio-pci 0000:00:1f.3: ipc tx: 0x40010000: GLB_PM_MSG: CTX_SAVE
[ 8077.845797] sof-audio-pci 0000:00:1f.3: error: ipc timed out for 0x40010000 size 76
[ 8077.845801] sof-audio-pci 0000:00:1f.3: info: preventing DSP entering D3 state to preserve context
[ 8077.845808] [3284] sof-audio-pci 0000:00:1f.3: unknown ROM status value ffffffff
[ 8077.845875] sof-audio-pci 0000:00:1f.3: invalid header size 0xffffffff. FW oops is bogus
[ 8077.845877] sof-audio-pci 0000:00:1f.3: error: unexpected fault 0xffffffff trace 0xffffffff
[ 8077.845888] sof-audio-pci 0000:00:1f.3: error: hda irq intsts 0x00000000 intlctl 0xc0000000 rirb 00
[ 8077.845890] sof-audio-pci 0000:00:1f.3: error: dsp irq ppsts 0x00000000 adspis 0x00000000
[ 8077.845896] sof-audio-pci 0000:00:1f.3: error: host status 0x00000000 dsp status 0x00000000 mask 0x00000003
[ 8077.845898] sof-audio-pci 0000:00:1f.3: ctx_save ipc error -110, proceeding with suspend
So it is the same old #2498 and an additional bug of failing to detect kernel errors during module loading-unloading. Closing this one, will open one for sof-test
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