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Date:      Thu, 28 Sep 2000 19:35:02 +0200
From:      "Jose M. Alcaide" <jose@we.lc.ehu.es>
To:        scsi@FreeBSD.org
Subject:   panic when removing device with "camcontrol rescan"
Message-ID:  <39D38146.671CFFF0@we.lc.ehu.es>

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Hello,

I am running a pretty recent -current (Sept. 21) on a machine equipped
with an Adaptec 7880 controller. There are a HD, a MO unit (both internal)
and a DLT drive connected to the SCSI bus.

I can trigger a panic if I power the DLT off and then type "camcontrol
rescan 0", in order to remove the CAM device. The SCSI subsystem hangs,
so I cannot generate a crash dump. I compiled a kernel with DDB, and
I got the following trace output (function parameters left out - I am
copying by hand):

destroy_dev() at destroy_dev+0x7
sacleanup() at sacleanup+0x2d
camperiphfree() at camperiphfree+0x42
cam_periph_invalidate()
cam_periph_async()
saaync()
xpt_async_bcast()
xpt_async()
probedone()
camisr()
swi_cambio()
intr_soft()
fork_trampoline()

If there is a way for getting more post-mortem information, I could
try it... Any ideas?

Cheers,
-- JMA
****** Jose M. Alcaide  //  jose@we.lc.ehu.es  //  jmas@FreeBSD.org ******
** "Beware of Programmers who carry screwdrivers" --  Leonard Brandwein **


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