Re: [Bug 15815] New: pata_legacy causes machine check

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On 04/20/2010 04:47 AM, bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote:
https://bugzilla.kernel.org/show_bug.cgi?id=15815

            Summary: pata_legacy causes machine check
            Product: IO/Storage
            Version: 2.5
     Kernel Version: 2.6.34-rc4
           Platform: All
         OS/Version: Linux
               Tree: Mainline
             Status: NEW
           Severity: normal
           Priority: P1
          Component: IDE
         AssignedTo: io_ide@xxxxxxxxxxxxxxxxxxxx
         ReportedBy: joerg@xxxxxxxxxxxx
         Regression: No


Hi,

upon load of the module pata_legacy, the kernel prints out these
messages:

[  292.354954] Machine check in kernel mode.
[  292.362298] Caused by (from SRR1=141030): Transfer error ack signal
[  292.369603] Machine check in kernel mode.
[  292.376759] Caused by (from SRR1=141030): Transfer error ack signal
[  292.384021] Machine check in kernel mode.
[  292.391157] Caused by (from SRR1=141030): Transfer error ack signal
[  292.398301] Machine check in kernel mode.
[  292.405328] Caused by (from SRR1=141030): Transfer error ack signal
[  292.412479] Machine check in kernel mode.
[  292.419481] Caused by (from SRR1=141030): Transfer error ack signal
[  292.426554] Machine check in kernel mode.
[  292.433432] Caused by (from SRR1=141030): Transfer error ack signal
[  292.440304] Machine check in kernel mode.
[  292.446972] Caused by (from SRR1=141030): Transfer error ack signal
[  292.453776] Machine check in kernel mode.
[  292.460357] Caused by (from SRR1=141030): Transfer error ack signal
[  292.466907] Machine check in kernel mode.
[  292.473329] Caused by (from SRR1=141030): Transfer error ack signal
[  292.479881] Machine check in kernel mode.
[  292.486311] Caused by (from SRR1=141030): Transfer error ack signal
[  292.492893] Machine check in kernel mode.
[  292.499426] Caused by (from SRR1=141030): Transfer error ack signal
[  292.506763] Machine check in kernel mode.
[  292.513518] Caused by (from SRR1=141030): Transfer error ack signal
[  292.520355] Oops: Machine check, sig: 7 [#1]
[  292.527133] PowerMac
[  292.533814] last sysfs file: /sys/module/libata/initstate
[  292.540592] Modules linked in: pata_legacy(+) ext2 sd_mod firewire_ohci
libata firewire_core crc_itu_t [last unloaded: pata_macio]
[  292.554912] NIP: c001610c LR: ea0eae88 CTR: c0016104
[  292.562118] REGS: e6dc3d60 TRAP: 0200   Not tainted  (2.6.34-rc4-test-2)
[  292.569473] MSR: 00141030<ME,IR,DR>   CR: 24022488  XER: 20000000
[  292.577030] TASK = e6cc6ed0[525] 'modprobe' THREAD: e6dc2000
[  292.577219] GPR00: ea0eb4ec e6dc3e10 e6cc6ed0 000000ac fce793f6 e6d78000
e6c8ac14 00000001
[  292.585036] GPR08: 00000000 ea4aa9c4 ea4aaaa8 c0016104 84022488 1002582c
ea4aa9c4 00810001
[  292.592931] GPR16: 00810001 c049785c 00000001 000003f6 00000001 ea4aa6ae
ea4aa810 00000000
[  292.600904] GPR24: 000001f0 ea4aa810 e6d78000 e6c8ac14 00000000 00000000
00000001 e6d78000
[  292.616742] NIP [c001610c] ioread8+0x8/0x18
[  292.624785] LR [ea0eae88] ata_sff_check_status+0x14/0x28 [libata]
[  292.632830] Call Trace:
[  292.640880] [e6dc3e10] [ea4aa6ae] legacy_base_port_ops+0x1ea/0xfffff754
[pata_legacy] (unreliable)
[  292.649324] [e6dc3e20] [ea0eb4ec] ata_sff_freeze+0x4c/0x74 [libata]
[  292.657787] [e6dc3e30] [ea0e575c] __ata_port_freeze+0x3c/0x5c [libata]
[  292.666279] [e6dc3e40] [ea0e57ac] ata_eh_freeze_port+0x30/0x58 [libata]
[  292.674799] [e6dc3e50] [ea0db1e0] ata_host_start+0x26c/0x300 [libata]
[  292.683299] [e6dc3e70] [ea0db2b0] ata_host_activate+0x3c/0x144 [libata]
[  292.691773] [e6dc3e90] [ea4afdb0] legacy_init+0xdb0/0x1008 [pata_legacy]
[  292.700254] [e6dc3f00] [c0003eec] do_one_initcall+0x70/0x20c
[  292.708741] [e6dc3f20] [c0062c0c] sys_init_module+0xf4/0x248
[  292.717165] [e6dc3f40] [c0012e2c] ret_from_syscall+0x0/0x38
[  292.725520] --- Exception: c01 at 0xff5e0c4
[  292.725523]     LR = 0x100057b0
[  292.741928] Instruction dump:
[  292.749996] 7fe3fb78 83410018 7c0803a6 8361001c 83810020 83a10024 83c10028
83e1002c
[  292.758398] 38210030 4e800020 7c0004ac 88630000<0c030000>  4c00012c 5463063e
4e800020
[  292.767014] ---[ end trace 529ce4fa7f676244 ]---

% cat /proc/cpuinfo
processor    : 0
cpu        : 7455, altivec supported
clock        : 606.000000MHz
revision    : 3.3 (pvr 8001 0303)
bogomips    : 36.86
timebase    : 18432000
platform    : PowerMac
model        : PowerBook6,3
machine        : PowerBook6,3
motherboard    : PowerBook6,3 MacRISC3 Power Macintosh
detected as    : 287 (iBook G4)
pmac flags    : 0000001b
L2 cache    : 256K unified
pmac-generation    : NewWorld
Memory        : 640 MB

% lspci
0000:00:0b.0 Host bridge: Apple Computer Inc. UniNorth 2 AGP
0000:00:10.0 VGA compatible controller: ATI Technologies Inc M9+ 5C63 [Radeon
Mobility 9200 (AGP)] (rev 01)
0001:10:0b.0 Host bridge: Apple Computer Inc. UniNorth 2 PCI
0001:10:12.0 Network controller: Broadcom Corporation BCM4306 802.11b/g
Wireless LAN Controller (rev 03)
0001:10:17.0 Class ff00: Apple Computer Inc. KeyLargo/Intrepid Mac I/O
0001:10:18.0 USB Controller: Apple Computer Inc. KeyLargo/Intrepid USB
0001:10:19.0 USB Controller: Apple Computer Inc. KeyLargo/Intrepid USB
0001:10:1a.0 USB Controller: Apple Computer Inc. KeyLargo/Intrepid USB
0001:10:1b.0 USB Controller: NEC Corporation USB (rev 43)
0001:10:1b.1 USB Controller: NEC Corporation USB (rev 43)
0001:10:1b.2 USB Controller: NEC Corporation USB 2.0 (rev 04)
0002:20:0b.0 Host bridge: Apple Computer Inc. UniNorth 2 Internal PCI
0002:20:0d.0 Class ff00: Apple Computer Inc. UniNorth/Intrepid ATA/100
0002:20:0e.0 FireWire (IEEE 1394): Apple Computer Inc. UniNorth 2 FireWire (rev
81)
0002:20:0f.0 Ethernet controller: Apple Computer Inc. UniNorth 2 GMAC (Sun GEM)
(rev 80)

Hmm. This driver basically bangs on some legacy IDE IO ports and tries to see if there's anything there. It seems like this machine doesn't like that very much.

Does it really make sense for this driver to be enabled for non-x86?
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