>Number:         12941
>Category:       kern
>Synopsis:       ahc driver panics with my AHA-2940
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon May 14 13:52:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Scott Telford
>Release:        1.5
>Organization:
Scott Telford,                                      st@devnull.demon.co.uk
Edinburgh, UK.                                      s.telford@bcs.org.uk
>Environment:
System: NetBSD trillian 1.5 NetBSD 1.5 (TRILLIAN) #1: Wed May 9 13:33:24 PDT 2001 st@trillian:/usr/src/sys/arch/i386/compile/TRILLIAN i386


>Description:
	The NetBSD/i386 1.5 INSTALL kernel ahc driver panics on
	boot-up when probing the SCSI bus on my Adaptec AHA-2940 Fast
	SCSI host adaptor (BIOS	1.23) with the message:

	panic: ahc1: brkadrint, Sequencer Parity Error at seqaddr=0x13c

	NetBSD 1.4.1 worked OK on the same system. I have the following
	SCSI devices:

	sd0 at scsibus0 target 0 lun0: <IBM, DDRS-34560, S97B> SCSI2 0/direct fixed
	st0 at scsibus0 target 4 lun 0: <ARCHIVE, Python 25501-XXX, 5.AC> SCSI2 1/sequential removable
	st1 at scsibus0 target 5 lun 0: <ARCHIVE, VIPER 150  21531, -004> SCSI1 1/sequential removable
	cd0 at scsibus0 target 6 lun 0: <TOSHIBA, CD-ROM XM-6401TA, 1009> SCSI2 5/cdrom removable

>How-To-Repeat:
	Boot NetBSD/i386 1.5 INSTALL kernel on system with AHA-2940 (?).

>Fix:
	Unknown - though the ahc_unbusy_tcl() addition in rev 1.62 of
	FreeBSD's /sys/dev/aic7xxx/aic7xxx.c looks like it might be
	relevant (haven't tried this yet).
>Release-Note:
>Audit-Trail:
>Unformatted: