kern/37936: jmide(4) with ATAPI devices is too fragile

[juan%xtrarom.org@localhost]

>Number:         37936
>Category:       kern
>Synopsis:       jmide(4) with ATAPI devices is too fragile
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Feb 01 09:50:00 +0000 2008
>Originator:     juan%xtrarom.org@localhost
>Release:        NetBSD 4.99.52
>Organization:
Juan Romero Pardines             The NetBSD Project
http://plog.xtrarom.org/         NetBSD/pkgsrc news in Spanish
http://mklivecd.xtrarom.org/     Make your own NetBSD Live CD/DVD!
>Environment:
System: NetBSD sasha 4.99.52 NetBSD 4.99.52 (Nocturno-nodbg) #49: Fri Feb 1 
06:46:47 CET 2008 
juan@sasha:/home/juan/build/i386/obj/sys/arch/i386/compile/Nocturno-nodbg i386
Architecture: i386
Machine: i386
>Description:

        I've been using this machine for long time now and all seems
        to work fine, but today I wanted to listen to a cdrom via
        digital transfer mode in cdplay(4) and this has shown some
        errors:

cd0(jmide1:0:1):  Check Condition on CDB: 0x28 00 00 00 00 00 00 00 01 00
SENSE KEY:  Illegal Request
ASC/ASCQ:  Illegal Mode For This Track

cd0: dos partition I/O error
jmide1:0:1: lost interrupt
type: atapi tc_bcount: 11760 tc_skip: 0
jmide1:0:1: bus-master DMA error: missing interrupt, status=0x41
jmide1:0:1: device timeout, c_bcount=11760, c_skip=0
cd0: transfer error, downgrading to Ultra-DMA mode 3
cd0(jmide1:0:1): using PIO mode 4, Ultra-DMA mode 3 (using DMA)
jmide1:0:1: lost interrupt
type: atapi tc_bcount: 11760 tc_skip: 0
jmide1:0:1: bus-master DMA error: missing interrupt, status=0x41
jmide1:0:1: device timeout, c_bcount=11760, c_skip=0
cd0: transfer error, downgrading to Ultra-DMA mode 2
cd0(jmide1:0:1): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using DMA)
jmide1:0:1: lost interrupt
type: atapi tc_bcount: 11760 tc_skip: 0
jmide1:0:1: bus-master DMA error: missing interrupt, status=0x41
jmide1:0:1: device timeout, c_bcount=11760, c_skip=0
cd0: transfer error, downgrading to Ultra-DMA mode 1
cd0(jmide1:0:1): using PIO mode 4, Ultra-DMA mode 1 (using DMA)
jmide1:0:1: lost interrupt
type: atapi tc_bcount: 11760 tc_skip: 0
jmide1:0:1: bus-master DMA error: missing interrupt, status=0x41
jmide1:0:1: device timeout, c_bcount=11760, c_skip=0
jmide1:0:1: piomode timed out

        And so on... any time I use digital transfer mode and play the
        cdrom there's a lost interrupt.
        
        Full dmesg at: http://www.xtrarom.org/~juan/dmesg-sasha.txt

>How-To-Repeat:
        cdplay; play
>Fix:
        Yes, please.