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    SubjectRe: 2.6.12-rc4, -mm: bad ide-cs problems
    Pavel Machek wrote:
    > On St 25-05-05 13:27:45, Pavel Machek wrote:
    >
    >>Hi!
    >>
    >>I see some problems in pcmcia subsystem in 2.6.12-rc4:
    >>
    >>On compaq nx5000, inserting CF ide card is recognized as anonymous
    >>memory. On compaq evo, it is recognized okay and
    >>mounts/works. Unfortunately when I unplug the card, I get an oops:
    >>
    >>Message from syslogd@Elf at Wed May 25 13:25:25 2005 ...
    >>Elf kernel: Unable to handle kernel NULL pointer dereference at
    >>virtual address 00000010
    >>
    >>Message from syslogd@Elf at Wed May 25 13:25:25 2005 ...
    >>Elf kernel: printing eip:
    >>
    >>Message from syslogd@Elf at Wed May 25 13:25:25 2005 ...
    >>Elf kernel: *pde = 00000000
    >>
    >>Message from syslogd@Elf at Wed May 25 13:25:25 2005 ...
    >>Elf kernel: Oops: 0000 [#1]
    >>
    >>. -mm kernel actually works better on nx5000; it behaves similary to
    >>-rc4 on evo; unfortunately it produces similar oops on card unplug.
    >
    >
    > This is full oops from -rc4 on compaq evo:
    >
    > hde: cache flushes not supported
    > hde: hde1
    > ide-cs: hde: Vcc = 3.3, Vpp = 0.0
    > hde: hde1
    > hde: hde1
    > Unable to handle kernel NULL pointer dereference at virtual address
    > 00000010
    > printing eip:
    > c033d618
    > *pde = 00000000
    > Oops: 0000 [#1]
    > PREEMPT
    > Modules linked in:
    > CPU: 0
    > EIP: 0060:[<c033d618>] Not tainted VLI
    > EFLAGS: 00010292 (2.6.12-rc4)
    > EIP is at ide_drive_remove+0x8/0x10
    > eax: c07825f8 ebx: c0782704 ecx: c07826f0 edx: 00000000
    > esi: c07826e0 edi: c065fed8 ebp: 00000001 esp: dfce5e84
    > ds: 007b es: 007b ss: 0068
    > Process pccardd (pid: 932, threadinfo=dfce4000 task=dfc84a40)
    > Stack: c02dc4b4 c07826e0 c065fa00 c0782568 c02dc724 c07826e0 c0782a80
    > c02db5e2
    > c07826e0 df373a80 c02db628 c07825f8 c033bcfb c0782568 00000002
    > df373b80
    > df373b80 c0670680 c0670728 c034f63b df758200 00000000 c034f67a
    > c0386108
    > Call Trace:
    > [<c02dc4b4>] device_release_driver+0x74/0x80

    Pavel,
    I had a similar problem which I fixed amd posted to lkml a while ago
    though I seems to got ignored by the ide maintainer. Please see if this
    helps in your case:

    http://marc.theaimsgroup.com/?l=linux-kernel&m=111409743421578&w=2
    --
    Andreas Steinmetz SPAMmers use robotrap@domdv.de
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