Re: [ahd driver] 12.3: kernel crash when stopping disks

09.12.2021 19:23, Peter wrote:

>> Dec  5 01:08:25 <local0.info> edge gstopd[64139]: Error received from stop unit command
>> Dec  5 01:08:25 <kern.crit> edge kernel: ahd0: Recovery Initiated - Card was not paused
>> Dec  5 01:08:25 <kern.crit> edge kernel: >>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<
>> Dec  5 01:08:25 <kern.crit> edge kernel: ahd0: Dumping Card State at program address 0x7e Mode 0x22
> 
>> Dec  5 01:08:25 <kern.crit> edge kernel: (pass0:ahd0:0:0:0): SCB 247 - timed out
>> Dec  5 01:08:25 <kern.crit> edge kernel: (pass0:ahd0:0:0:0): Queuing a BDR SCB
>> Dec  5 01:08:25 <kern.crit> edge kernel: (pass0:ahd0:0:0:0): Bus Device Reset Message Sent
> 
> 
> Hija,
> 
>  I had a closer look into this one:
> 
> There must be a timeout flaw in the driver logic. I tried to run the
> STOP UNIT from camcontrol with "-t 30", but nevertheless these
> controller errors happen to appear after some 5 or 10 seconds.
> So whereever it gets the timeout from, it is not the right one.
> 
> The kernel crash is then an occasional consequence of these strange
> timeouts - it happened only once, while the erroneous timeouts happen
> more often.
> 
> I now workaround the issue: as the STOP UNIT is the only concerned
> command, I invoke that with the IMMED bit, not waiting until the disk
> finally stops: as this is only for saving the rain-forests (any my
> power bill), I don't care if or when the disks might manage to stop. 
> 
> No more problems or errors since that.

Please file a PR so you swap-related problems are not lost.