AHCI oops

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To: jgarzik@pobox.com, linux-kernel@vger.kernel.org
Date:	Fri, 17 Dec 2004 17:23:18 +0000 (GMT)

Have a new AHCI board to test and it oopses pretty quickly just with a few
reads simultaneously.

device is
00:1f.2 Class 0106: Intel Corp. 82801FR/FRW (ICH6R/ICH6RW) SATA Controller (rev 03)

/proc/interrupts
           CPU0 CPU1
  0: 551924 520177 IO-APIC-edge timer
  1: 8 0 IO-APIC-edge i8042
  8: 1 0 IO-APIC-edge rtc
  9: 0 0 IO-APIC-level acpi
 14: 3290 528 IO-APIC-edge ide0
169: 14873 0 IO-APIC-level eth0, uhci_hcd
177: 64 24 IO-APIC-level uhci_hcd, libata
185: 0 0 IO-APIC-level ehci_hcd, uhci_hcd
193: 0 0 IO-APIC-level uhci_hcd
NMI: 0 0
LOC: 1071874 1071975
ERR: 0
MIS: 0

kernel 2.6.10-rc3

ata2: error occurred, port reset
Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
f890a62b
*pde = 00000000
Oops: 0000 [#1]
SMP
Modules linked in: sd_mod ahci libata scsi_mod autofs4 i2c_dev i2c_core sunrpc dCPU: 1
EIP: 0060:[<f890a62b>] Not tainted VLI
EFLAGS: 00010202 (2.6.10-rc3)
EIP is at ata_to_sense_error+0x4c/0x3e0 [libata]
eax: 00000000 ebx: f39a6980 ecx: f380a250 edx: f39a6980
esi: 00000000 edi: f39a6a44 ebp: 00000000 esp: f7f23e94
ds: 007b es: 007b ss: 0068
Process swapper (pid: 0, threadinfo=f7f22000 task=c18f8520)
Stack: 00000001 00000000 00004ae6 f39a6980 01000292 f39a6980 f380a70c f3cb0340
       f380a70c f890af1c f380a70c 00000001 f380a70c 00000001 f8909015 f380a70c
       00000001 40000001 f3cb0340 c011ddd8 f380a250 40000001 f8912601 f380a70c
Call Trace:
 [<f890af1c>] ata_scsi_qc_complete+0x3c/0x3e [libata]
 [<f8909015>] ata_qc_complete+0x34/0xae [libata]
 [<c011ddd8>] printk+0x17/0x1b
 [<f8912601>] ahci_interrupt+0x8e/0x16c [ahci]
 [<c013aa47>] handle_IRQ_event+0x39/0x6d
 [<c013ab4e>] __do_IRQ+0xd3/0x155
 [<c0105698>] do_IRQ+0x30/0x5a
 [<c0103df2>] common_interrupt+0x1a/0x20
 [<c010157e>] mwait_idle+0x25/0x4a
 [<c010154b>] cpu_idle+0x2e/0x3c
Code: c7 82 54 01 00 00 02 00 00 00 81 c7 c4 00 00 00 a8 01 0f 84 53 01 00 00 8
 <0>Kernel panic - not syncing: Fatal exception in interrupt

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