Dell PowerEdge 1750 and mpt

[Nate Lawson]

On Wed, 15 Oct 2003, David Sze wrote:
> At 11:30 PM 14/10/2003 -0700, Nate Lawson wrote this to All:
> >This shows that an invalid CCB is being passed through the pass(4) driver.
>
> The application talks to pass(4) to periodically retrieve the serial
> numbers of all devices on the bus (the code is basically copied from
> "camcontrol inquiry -S", plus some code to enumerate the bus).  So that is
> consistent with how often we are seeing the crashes.  I'll go over the code
> to make sure there are no blatant errors on my part.  The only puzzling
> thing is that the same code runs flawlessly on a variety of similar
> hardware, some machines also with mpt(4), but mostly ahc(4) and ahd(4)
> controllers.

Try running camcontrol inquiry -S on the same device in a loop and see if
it gets the same panic.

> > > pass3 at mpt0 bus 0 target 6 lun 0
> > > pass3: <PE/PV 1x3 SCSI BP 1.1> Fixed Processor SCSI-2 device
> > > pass3: 3.300MB/s transfers
> >
> >This is the device you're trying to talk to.  I'm really suspicious your
> >program is sending a garbage pointer in the CCB to the pass(4) driver.  On
> >the above core, please send the output of "fr 7" and then "print *ccb".
>
> (kgdb) fr 7
> #7  0x80174507 in mpt_action (sim=0x923867c0, ccb=0x961a0000) at
> ../../dev/mpt/mpt_freebsd.c:1311
> 1311      if (mpt_read_cfg_page(mpt, tgt, &tmp.Header)) {
> (kgdb) print *ccb
>          stqe_next = 0x0}}, retry_count = 4, cbfcnp = 0x80129a94
> <passdone>, func_code = XPT_GET_TRAN_SETTINGS, status = 0,

Why are you sending a XPT_GET_TRAN_SETTINGS CCB?  That's not even needed
to get the serial number.  In any case, I need the output of
print ccb->cts.

-Nate