Hello,

Concerns: Kernel 2.6.0-test9
SCSI emulation driver crash/hang

I encountered this error while ripping an audio CD with CDParanoia, very 
soon after starting the rip.
The process now hangs.. it seems indefinitly.
Hardware always functioned fine with older kernels.

Spec:
- Kernel 2.6.0-test9
- CPUInfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 7
model name      : Pentium III (Katmai)
stepping        : 3
cpu MHz         : 551.372
cache size      : 512 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 mmx fxsr sse
bogomips        : 1089.53
- Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: Creative Model:  CD-ROM CD4832E  Rev: C1.3
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 00 Lun: 00
  Vendor: HP       Model: CD-Writer+ 9100b Rev: 1.06
  Type:   CD-ROM                           ANSI SCSI revision: 02
- SCSI CD-ROM support is loaded as module
- SCSI emulation in kernel, and used for both drives

dmesg log:
----------------------------
Uniform CD-ROM driver Revision: 3.12
Attached scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
sr1: scsi3-mmc drive: 32x/32x writer cd/rw xa/form2 cdda tray
Attached scsi CD-ROM sr1 at scsi1, channel 0, id 0, lun 0
hdd: lost interrupt
ide-scsi: abort called for 18039
ide-scsi: abort called for 18038
ide-scsi: reset called for 18039
hdd: DMA disabled
------------[ cut here ]------------
kernel BUG at drivers/scsi/ide-scsi.c:493!
invalid operand: 0000 [#1]
CPU:    0
EIP:    0060:[<c025eedc>]    Tainted: P
EFLAGS: 00010286
EIP is at idescsi_transfer_pc+0x9c/0x130
eax: c0243460   ebx: c03f874c   ecx: e2164a31   edx: 00000172
esi: deef5660   edi: efcb5bc0   ebp: efc71e00   esp: efc71ddc
ds: 007b   es: 007b   ss: 0068
Process scsi_eh_1 (pid: 11, threadinfo=efc70000 task=efc73900)
Stack: 00000172 c03f874c 00000008 00000080 0000001e efcb5bc0 c03f874c 
ce872180
       00000000 efc71e2c c023f7b1 c03f874c deef5660 00000000 00000088 
0000001e
       0000000f ce872180 c03f874c c03f84f0 efc71e5c c023fae1 c03f874c 
ce872180
Call Trace:
 [<c023f7b1>] start_request+0x181/0x290
 [<c023fae1>] ide_do_request+0x1f1/0x370
 [<c022ae67>] __elv_add_request+0x27/0x40
 [<c02402fe>] ide_do_drive_cmd+0xce/0x140
 [<c025f7dc>] idescsi_queue+0x1ec/0x650
 [<c0258696>] scsi_send_eh_cmnd+0xa6/0x180
 [<c02585a0>] scsi_eh_done+0x0/0x50
 [<c0258570>] scsi_eh_times_out+0x0/0x30
 [<c0258a90>] scsi_eh_tur+0x90/0xd0
 [<c0258cf5>] scsi_eh_bus_device_reset+0x105/0x130
 [<c02593f8>] scsi_eh_ready_devs+0x28/0x80
 [<c0259590>] scsi_unjam_host+0xc0/0xd0
 [<c0259670>] scsi_error_handler+0xd0/0x110
 [<c02595a0>] scsi_error_handler+0x0/0x110
 [<c01082d9>] kernel_thread_helper+0x5/0xc
 
Code: 0f 0b ed 01 cf 09 32 c0 8b 56 38 a1 c0 9e 34 c0 89 d1 29 c1
 hdd: ATAPI reset complete
hdd: lost interrupt

Please ask if you need more info.

Wladimir