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    SubjectRe: [OOPS] paport related OOPS since 2.6.11-bk7
    Russell King wrote:
    > On Mon, Mar 28, 2005 at 06:45:43PM +0200, Eran Mann wrote:
    >
    >>The OOPS below gets generated consistently when FC3 kudzu is run during
    >>boot (tested between 2.6.11-bk7 and 2.6.11.6-bk1). It seems to be caused
    >>by the hotplug-parport changeset:
    >>http://linux.bkbits.net:8080/linux-2.5/cset@4230791b6YtcIhZDSvvWbzSdUpg2zg?nav=index.html|ChangeSet@-4w
    >>(reverting this changeset eliminates the oops).
    >
    >
    > Please try this instead.
    >
    > It appears that the parport driver claims on-board superio devices
    > without actually doing anything. When the driver is removed, we
    > try to dereference non-existent driver data to unregister the ports.
    > Since we didn't register anything, it's safe to ignore these devices
    > in the remove function.
    >
    > Signed-off-by: Russell King <rmk@arm.linux.org.uk>
    >
    > diff -up -x BitKeeper -x ChangeSet -x SCCS -x _xlk -x *.orig -x *.rej orig/drivers/parport/parport_pc.c linux/drivers/parport/parport_pc.c
    > --- orig/drivers/parport/parport_pc.c Sat Mar 19 11:22:08 2005
    > +++ linux/drivers/parport/parport_pc.c Mon Mar 28 17:55:51 2005
    > @@ -2976,10 +2976,12 @@ static void __devexit parport_pc_pci_rem
    >
    > pci_set_drvdata(dev, NULL);
    >
    > - for (i = data->num - 1; i >= 0; i--)
    > - parport_pc_unregister_port(data->ports[i]);
    > + if (data) {
    > + for (i = data->num - 1; i >= 0; i--)
    > + parport_pc_unregister_port(data->ports[i]);
    >
    > - kfree(data);
    > + kfree(data);
    > + }
    > }
    >
    > static struct pci_driver parport_pc_pci_driver = {
    >

    Doesn't seem to help. Do you want me to check anything else?
    Mar 28 17:13:44 eran kernel: parport0: PC-style at 0x378, irq 7 [PCSPP,EPP]
    Mar 28 17:13:44 eran kernel: parport_pc: VIA parallel port: io=0x378, irq=7
    Mar 28 17:13:44 eran kernel: Unable to handle kernel NULL pointer
    dereference at virtual address 00000000
    Mar 28 17:13:44 eran kernel: printing eip:
    Mar 28 17:13:44 eran kernel: d3f37368
    Mar 28 17:13:44 eran kernel: *pde = 00000000
    Mar 28 17:13:44 eran kernel: Oops: 0000 [#1]
    Mar 28 17:13:44 eran kernel: PREEMPT
    Mar 28 17:13:44 eran kernel: Modules linked in: parport_pc parport
    binfmt_misc nls_cp437 nls_iso8859_1 ntfs video thermal processor fan
    container button battery ac uhci_hcd usbcore 3c59x mii
    Mar 28 17:13:44 eran kernel: CPU: 0
    Mar 28 17:13:44 eran kernel: EIP: 0060:[<d3f37368>] Not tainted VLI
    Mar 28 17:13:44 eran kernel: EFLAGS: 00010286 (2.6.11-bk6-patched)
    Mar 28 17:13:44 eran kernel: EIP is at parport_pc_pci_remove+0x18/0x40
    [parport_pc]
    Mar 28 17:13:44 eran kernel: eax: c12ef844 ebx: c12ef800 ecx:
    c12ef844 edx: d3f37350
    Mar 28 17:13:44 eran kernel: esi: 00000000 edi: d3f3cd48 ebp:
    ce585ecc esp: ce585ec0
    Mar 28 17:13:44 eran kernel: ds: 007b es: 007b ss: 0068
    Mar 28 17:13:44 eran kernel: Process modprobe (pid: 3503,
    threadinfo=ce585000 task=cffdf040)
    Mar 28 17:13:44 eran kernel: Stack: c0190441 c12ef800 c12ef844 ce585edc
    c0237c06 c12ef800 c12ef868 ce585ef8
    Mar 28 17:13:44 eran kernel: c02f9c5c c12ef844 c03ff1cd d3f3cd90
    d3f3cd90 d3f375a0 ce585f0c c02f9c80
    Mar 28 17:13:44 eran kernel: c12ef844 d3f3cd48 00000000 ce585f24
    c02fa17a d3f3cd48 d3f3cd48 d3f3cd48
    Mar 28 17:13:44 eran kernel: Call Trace:
    Mar 28 17:13:44 eran kernel: [<c0103ecf>] show_stack+0x7f/0xa0
    Mar 28 17:13:44 eran kernel: [<c0104066>] show_registers+0x156/0x1d0
    Mar 28 17:13:44 eran kernel: [<c010428a>] die+0xea/0x180
    Mar 28 17:13:44 eran kernel: [<c0114e22>] do_page_fault+0x482/0x6ba
    Mar 28 17:13:44 eran kernel: [<c0103b33>] error_code+0x2b/0x30
    Mar 28 17:13:44 eran kernel: [<c0237c06>] pci_device_remove+0x36/0x40
    Mar 28 17:13:44 eran kernel: [<c02f9c5c>] device_release_driver+0x7c/0x80
    Mar 28 17:13:44 eran kernel: [<c02f9c80>] driver_detach+0x20/0x30
    Mar 28 17:13:44 eran kernel: [<c02fa17a>] bus_remove_driver+0x4a/0x90
    Mar 28 17:13:44 eran kernel: [<c02fa742>] driver_unregister+0x12/0x20
    Mar 28 17:13:44 eran kernel: [<c0237e45>] pci_unregister_driver+0x15/0x20
    Mar 28 17:13:44 eran kernel: [<d3f3763e>] parport_pc_exit+0x9e/0xae
    [parport_pc]
    Mar 28 17:13:44 eran kernel: [<c01343fe>] sys_delete_module+0x17e/0x1b0
    Mar 28 17:13:44 eran kernel: [<c010304b>] sysenter_past_esp+0x54/0x75
    Mar 28 17:13:44 eran kernel: Code: 44 24 04 89 0c 24 ff d2 eb 94 89 f6
    8d bc 27 00 00 00 00 55 89 e5 56 53 83 ec 04 8b 45 08 83 c0 44 8b 70 74
    c7 40 74 00 00 00 00 <8b> 1e eb 10 8d 74 26 00 8b 44 9e 04 89 04 24 e8
    d4 f4 ff ff 4b


    --
    Eran Mann
    Senior Software Engineer
    MRV International
    Tel: 972-4-9936297
    Fax: 972-4-9890430
    www.mrv.com
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