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    SubjectRe: [BUG] PATA_PCMCIA does not work

    Hi,

    I tried the kernel 2.6.20-git14,
    the pata_pcmcia drive works properly.Thanks!

    But I do the "pccardctl eject"
    NULL-pointer-dereference error happens.


    [dmesg]
    pcmcia: registering new device pcmcia1.0
    SCSI subsystem initialized
    libata version 2.10 loaded.
    ata1: PATA max PIO0 cmd 0x0001d100 ctl 0x0001d10e bmdma 0x00000000 irq 3
    scsi0 : pata_pcmcia
    ata1.00: CFA: Hitachi XXM2.3.0, Rev 3.00, max PIO1
    ata1.00: 62592 sectors, multi 0: LBA
    ata1.00: configured for PIO0
    scsi 0:0:0:0: Direct-Access ATA Hitachi XXM2.3.0 Rev PQ: 0 ANSI: 5
    scsi 0:0:0:0: Attached scsi generic sg0 type 0
    SCSI device sda: 62592 512-byte hdwr sectors (32 MB)
    sda: Write Protect is off
    sda: Mode Sense: 00 3a 00 00
    SCSI device sda: write cache: disabled, read cache: enabled, doesn't support DPO or FUA
    SCSI device sda: 62592 512-byte hdwr sectors (32 MB)
    sda: Write Protect is off
    sda: Mode Sense: 00 3a 00 00
    SCSI device sda: write cache: disabled, read cache: enabled, doesn't support DPO or FUA
    sda: sda1
    sd 0:0:0:0: Attached scsi removable disk sda
    pccard: card ejected from slot 1
    ata1.00: disabled
    BUG: unable to handle kernel NULL pointer dereference at virtual address 00000020
    printing eip:
    d89f7f3e
    *pde = 00000000
    Oops: 0000 [#1]
    Modules linked in: nls_ascii vfat fat sd_mod sg pata_pcmcia libata scsi_mod dm_mirror dm_multipath dm_mod pcmcia yenta_socket rsrc_nonstatic pcmcia_core
    CPU: 0
    EIP: 0060:[<d89f7f3e>] Not tainted VLI
    EFLAGS: 00010246 (2.6.20-git14 #1)
    EIP is at ata_host_release+0x2e/0x48 [libata]
    eax: d7981884 ebx: d545b8c0 ecx: d7f6f180 edx: d545b8cc
    esi: 00000000 edi: 00000000 ebp: 00000000 esp: d5bfde58
    ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
    Process pccardctl (pid: 1711, ti=d5bfc000 task=c13d1540 task.ti=d5bfc000)
    Stack: d545b8c0 d5ac4700 d7981a24 c0220120 d7981a24 d7981884 00000006 d5ac4720
    d5ac4660 d7981884 d887c278 d71c8dbc d7c53c48 c02201e9 00000286 d7981884
    c021d363 d7981884 d7981884 c021d7ae d798192c c021cd84 d7981884 d7981884
    Call Trace:
    [<c0220120>] release_nodes+0x10f/0x12f
    [<c02201e9>] devres_release_all+0x27/0x2a
    [<c021d363>] __device_release_driver+0x78/0x8e
    [<c021d7ae>] device_release_driver+0x31/0x46
    [<c021cd84>] bus_remove_device+0x6d/0x7d
    [<c021b58a>] device_del+0x162/0x1bf
    [<c021b5ef>] device_unregister+0x8/0x10
    [<d88304b9>] pcmcia_card_remove+0x66/0x81 [pcmcia]
    [<d883143d>] ds_event+0x4a/0x6d [pcmcia]
    [<c01b6db5>] kobject_get+0xf/0x13
    [<d88172da>] send_event+0x31/0x49 [pcmcia_core]
    [<d88174b9>] socket_shutdown+0xc/0xb3 [pcmcia_core]
    [<d881757c>] socket_remove+0x1c/0x26 [pcmcia_core]
    [<d88175c5>] pcmcia_eject_card+0x3f/0x4c [pcmcia_core]
    [<d8819e48>] pccard_store_eject+0x1b/0x22 [pcmcia_core]
    [<d8819e2d>] pccard_store_eject+0x0/0x22 [pcmcia_core]
    [<c021af3b>] dev_attr_store+0x27/0x2c
    [<c017d1cb>] sysfs_write_file+0xbc/0xe5
    [<c017d10f>] sysfs_write_file+0x0/0xe5
    [<c014df18>] vfs_write+0x8a/0x10c
    [<c014e3ae>] sys_write+0x41/0x67
    [<c0103c76>] sysenter_past_esp+0x5f/0x85
    [<c02b0000>] wait_for_completion+0x33/0xaf
    =======================
    Code: 56 53 8b b0 50 01 00 00 eb 21 8b 5c be 34 85 db 74 18 8b 43 04 8b 90 88 00 00 00 85 d2 74 04 89 d8 ff d2 8b 03 e8 fa 0d e6 ff 47 <3b> 7e 20 72 da 8b 46 28 8b 90 8c 00 00 00 85 d2 74 04 89 f0 ff
    EIP: [<d89f7f3e>] ata_host_release+0x2e/0x48 [libata] SS:ESP 0068:d5bfde58

    Best Regards
    Komuro

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