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SubjectRe: libATA PATA status report, new patch
Date
Tried in Qemu with virtual PIIX3. Compiled in PIIX, OLDPIIX, MPIIX and
Generic. Enabled PATA support for libata in libata.h. Disabled
everything in ATA/IDE Kconfig menu.

ata1: PATA max PIO4 cmd 0x1F0 ctl 0x3F6 bmdma 0x0 irq 15
Unable to handle kernel NULL pointer dereference at virtual address 00000000
printing eip:
00000000
*pde = 00000000
Oops: 0000 [#1]
CPU: 0
EIP: 0060:[<00000000>] Not tainted VLI
EFLAGS: 00000246 (2.6.16-rc2-PATA)
EIP is at 0x0
eax: c1268280 ebx: c12a88e0 ecx: c1268280 edx: c02fd2e0
esi: 0000003c edi: 00000001 ebp: c02ba272 esp: c1150cfc
ds: 007b es: 007b ss: 0068
Process swapper (pid: 1, threadinfo=c1150000 task=c114fa30)
Stack: <0>c0232b6c fc000000 c1150d9c 00000000 00000001 00000000 00000000 c12a88e0
c1268280 0000011a 00008000 c12ceb40 c1266408 c016cafb c12ceba0 c1266404
c12a88e0 0000003c c1266430 c12cf340 00000000 ffffffff c01bd61a ffffffff
Call Trace:
[<c0232b6c>] ata_device_add+0x34c/0xb00
[<c016cafb>] create_proc_entry+0x5b/0xd0
[<c01bd61a>] pci_get_subsys+0x6a/0xf0
[<c03478d5>] legacy_init+0x1d5/0x3b0
[<c0100311>] init+0x81/0x1e0
[<c0100290>] init+0x0/0x1e0
[<c0100bd5>] kernel_thread_helper+0x5/0x10
Code: Bad EIP value.

This seems to be from the generic code but I'm not sure. First I enabled only
PIIX (+ATA_ENABLE_PATA) but it failed to detect any ATA devices at all.

--
Meelis Roos
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