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Subjectaic7xxx oops with 2.4.5-ac13
Just upgraded from 2.4.3 to 2.4.5-ac13 and get an aiee, killing interrupt 
handler on boot as aic7xxx.o is loaded. I have an Adaptec 2906 PCI card
with a Nikon CoolscanIII and an HP optical drive attached. Works ok on
aic7xxx_old. Works with an initial bus reset on 2.4.3. Dies a horrible death
on 2.4.5-ac13.

trevor@trevor4:/tmp > /sbin/lspci
00:00.0 Host bridge: Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge (rev 03)
00:01.0 PCI bridge: Intel Corporation 440BX/ZX - 82443BX/ZX AGP bridge (rev 03)
00:07.0 ISA bridge: Intel Corporation 82371AB PIIX4 ISA (rev 02)
00:07.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 02)
00:09.0 SCSI storage controller: Adaptec AHA-7850 (rev 03)
00:0a.0 SCSI storage controller: Initio Corporation 360P (rev 02)
00:0b.0 Network controller: Compaq Computer Corporation Netelligent 10/100 (rev 10)
00:0c.0 Ethernet controller: 3Com Corporation 3c900 Combo [Boomerang]
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200 AGP (rev 01)

On 2.4.3 I get the following errors when aic7xxx loads

ahc_pci:0:9:0: WARNING no command for scb 0 (cmdcmplt)
scsi1 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.1.5
<Adaptec 2902/04/10/15/20/30C SCSI adapter>
aic7850: Single Channel A, SCSI Id=7, 3/255 SCBs

scsi1:0:2:0: Attempting to queue an ABORT message
(scsi1:A:2:0): Queuing a recovery SCB
scsi1:0:2:0: Device is disconnected, re-queuing SCB
Recovery code sleeping
(scsi1:A:2:0): Abort Message Sent
(scsi1:A:2:0): SCB 3 - Abort Completed.
Recovery SCB completes
Recovery code awake
aic7xxx_abort returns 8194

It then carries on and works.

Ksymoops output follows but may not be entirely reliable
because it's from a hand written file and /proc/ksyms and /proc/modules are
from 2.4.3.
trevor@trevor4:/tmp > more decoded-245-ksymoops
ksymoops 2.4.0 on i686 2.4.3. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.5-ac13/ (specified)
-m /l243/ (specified)

Unable to handle kernel NULL pointer dereference at virtual address 00000004
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c018d250>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010057
eax: 00000000 ebx: 00000012 ecx: 00000001 edx: 00000000
esi: ffffffff edi: d74f0600 ebp: 00000000 esp: c0233dc0
ds: 0018 es: 0018 ss: 0018
Process swapper (pid 0, stackpage=c0233000)
Stack: d9133058 00000000 00000000 00000012 00000000 d74f0600 00000000 414f0600
d74f0600 00000001 00000001 d91356ee d74f0600 d74f0690 00000000 00000000
00000003 d913e18f d74f0600 00000012 00000000 d74f0600 00000000 00000010
Call Trace: [<d9133058>] [<d91356ee>] [<d913e18f>] [<d913e4fd>] [<d913e539>]
[<c0115b98>] [<c0110000>] [<d9136b89>] [<e6948262>] [<c019c9a2>] [<c011c635>]
[<d9132ad4>] [<c0108301>] [<c01084e6>] [<c0105160>] [<c0105160>] [<c010a82e>]
[<c0105160>] [<c0105160>] [<c0100018>] [<c010518d>] [<c01051f2>] [<c0105000>]
Code: 8b 40 04 85 c0 74 15 3b 90 6c 00 00 00 75 07 80 88 fc 00 00

>>EIP; c018d250 <scsi_report_bus_reset+8/28> <=====
Trace; d9133058 <[serial].bss.end+18d5/18dd>
Trace; d91356ee <[aic7xxx]ahc_filter_command+20a/2a4>
Trace; d913e18f <[aic7xxx]ahc_reset+37/470>
Trace; d913e4fd <[aic7xxx]ahc_reset+3a5/470>
Trace; d913e539 <[aic7xxx]ahc_reset+3e1/470>
Trace; c0115b98 <release_console_sem+94/98>
Trace; c0110000 <mtrr_close+34/c8>
Trace; d9136b89 <[aic7xxx]ahc_pci_map_registers+1c5/254>
Trace; e6948262 <END_OF_CODE+d78b186/????>
Trace; c019c9a2 <cursor_timer_handler+22/28>
Trace; c011c635 <timer_bh+259/2b0>
Trace; d9132ad4 <[serial].bss.end+1351/18dd>
Trace; c0108301 <handle_IRQ_event+4d/78>
Trace; c01084e6 <do_IRQ+a6/f4>
Trace; c0105160 <default_idle+0/34>
Trace; c0105160 <default_idle+0/34>
Trace; c010a82e <call_do_IRQ+5/b>
Trace; c0105160 <default_idle+0/34>
Trace; c0105160 <default_idle+0/34>
Trace; c0100018 <startup_32+18/cb>
Trace; c010518d <default_idle+2d/34>
Trace; c01051f2 <cpu_idle+3e/54>
Trace; c0105000 <prepare_namespace+0/8>
Trace; c01001cf <L6+0/2>
Code; c018d250 <scsi_report_bus_reset+8/28>
00000000 <_EIP>:
Code; c018d250 <scsi_report_bus_reset+8/28> <=====
0: 8b 40 04 mov 0x4(%eax),%eax <=====
Code; c018d253 <scsi_report_bus_reset+b/28>
3: 85 c0 test %eax,%eax
Code; c018d255 <scsi_report_bus_reset+d/28>
5: 74 15 je 1c <_EIP+0x1c> c018d26c <scsi_report_bus_reset+24/28>
Code; c018d257 <scsi_report_bus_reset+f/28>
7: 3b 90 6c 00 00 00 cmp 0x6c(%eax),%edx
Code; c018d25d <scsi_report_bus_reset+15/28>
d: 75 07 jne 16 <_EIP+0x16> c018d266 <scsi_report_bus_reset+1e/28>
Code; c018d25f <scsi_report_bus_reset+17/28>
f: 80 88 fc 00 00 00 00 orb $0x0,0xfc(%eax)

<0> Kernel panic: Aiee, killing interrupt handler!

1070 warnings issued. Results may not be reliable.

Trevor Hemsley, Brighton, UK.

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