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suspend/resume: odd sequence on module_remove #94
Description
after booting on Up2 w/ Hifiberry (doing nothing), when I try to remove the modules w/ sof_remove.sh, I see an attempt to resume the DSP and a debugfs error.
[ 7.711909] sof-audio sof-audio: ipc tx: 0x40010000: GLB_PM_MSG: CTX_SAVE
[ 7.711978] sof-audio sof-audio: ipc tx succeeded: 0x40010000: GLB_PM_MSG: CTX_SAVE
[ 7.711989] sof-audio sof-audio: tag 1 not opened!
[ 7.733272] sof-audio sof-audio: DSP core(s) enabled? 0 : core_mask 3
At this point the audio driver is in D3. When I run sof_remove.sh, I get
[ 99.765883] sof-audio sof-audio: loading firmware
[ 99.765892] sof-audio sof-audio: booting DSP firmware
[ 99.766093] sof-audio sof-audio: unstall/run core: core_mask = 1
[ 99.766099] sof-audio sof-audio: DSP core(s) enabled? 1 : core_mask 1
[ 99.810698] sof-audio sof-audio: Firmware download successful, booting...
[ 99.810826] sof-audio sof-audio: ipc rx: 0x70000000: FW_READY
[ 99.810835] sof-audio sof-audio: ipc: DSP is ready 0x70000000 offset 0x81000
[ 99.810876] sof-audio sof-audio: Firmware info: version 1.1-83ed9 build 32 on Aug 22 2018:17:28:31
[ 99.810968] sof-audio sof-audio: found ext header type 1 size 0x9c
[ 99.810997] sof-audio sof-audio: cannot create debugfs entry.
[ 99.811373] sof-audio sof-audio: cannot create debugfs entry.
[ 99.811806] sof-audio sof-audio: cannot create debugfs entry.
[ 99.812174] sof-audio sof-audio: cannot create debugfs entry.
[ 99.812561] sof-audio sof-audio: cannot create debugfs entry.
[ 99.812925] sof-audio sof-audio: cannot create debugfs entry.
[ 99.813290] sof-audio sof-audio: cannot create debugfs entry.
[ 99.813666] sof-audio sof-audio: mailbox upstream 0x81000 - size 0x1000
[ 99.813682] sof-audio sof-audio: mailbox downstream 0xa0000 - size 0x2000
[ 99.813692] sof-audio sof-audio: stream region 0xc1000 - size 0x1000
[ 99.813697] sof-audio sof-audio: booting DSP firmware completed
[ 99.813705] sof-audio sof-audio: ipc rx done: 0x70000000: FW_READY
[ 99.815614] sof-audio sof-audio: firmware boot complete
[ 99.815647] sof-audio sof-audio: stream_tag: 1
Unclear to me why the resume happens precisely when the module is being removed?
In addition we shouldn't see this debugfs error.
Activity
ranj063 commentedon Sep 25, 2018
@mengdonglin this is expected behaviour for PCI devices. The pci device if it is runtime suspended at the time the kernel module is unloaded, its runtime_resume gets called to bring it back to full power.
So it is not an issue. Is it OK to close this now?
wenqingfu commentedon Dec 20, 2018
@plbossart are you ok to close it?
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