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    SubjectRe: [FW ide-cs] Re: jvc cdrom drive lockup
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    Date
    On Fri, 2007-05-04 at 23:32 +0900, Komuro wrote:
    > On Thu, 03 May 2007 15:29:19 +0100
    > Richard Kennedy <richard@rsk.demon.co.uk> wrote:
    >
    >
    > IDE bugs should be posted to the linux-ide mailing list.
    >
    >
    > > Hi all,
    > > I have a JVC MP-CDX1 cdrom drive that came with my laptop which used to
    > > work with ide-cs but stopped working with newer kernels.
    > >
    > > I added its ident to ide-cs.c (see patch below) and the drive now is
    > > detected and gets mounted when plugged in and seems to work correctly.
    > >
    > > But when I eject the card, pccardctl eject 0, the laptop locks up
    > > completely, there are no messages in the log, and the fan goes to full
    > > speed so I guess the cpu is running at 100%.
    > > Any ideas what's going wrong or how to debug it ?
    > > Is there anything else I need to patch to get this working ?
    > >
    > > Thanks
    > > Richard
    > >
    > > card info :-
    > >
    > > PRODID_1="KME"
    > > PRODID_2="KXLC005"
    > > PRODID_3="00"
    > > PRODID_4=""
    > > MANFID=0032,2904
    > > FUNCID=8
    > >
    > > log messages on insert :-
    > >
    > > May 3 11:22:52 mininote kernel: pccard: PCMCIA card inserted into slot 0
    > > May 3 11:22:52 mininote kernel: cs: memory probe 0xa0000000-0xa0ffffff: clean.
    > > May 3 11:22:52 mininote kernel: pcmcia: registering new device pcmcia0.0
    > > May 3 11:22:53 mininote kernel: hdc: UJDB130, ATAPI CD/DVD-ROM drive
    > > May 3 11:22:53 mininote kernel: ide1 at 0x190-0x197,0x396 on irq 3
    > > May 3 11:22:53 mininote kernel: ide-cs: hdc: Vpp = 0.0
    > > May 3 11:22:54 mininote kernel: hdc: ATAPI 20X CD-ROM drive, 128kB Cache
    > > May 3 11:22:54 mininote kernel: Uniform CD-ROM driver Revision: 3.20
    > > May 3 11:23:04 mininote hald: mounted /dev/hdc on behalf of uid 500
    > > May 3 11:23:34 mininote hald: unmounted /dev/hdc from '/media/FC_4 i386 ftp #1' on behalf of uid 500
    > > May 3 11:24:17 mininote kernel: pccard: card ejected from slot 0
    > > << lockup happened here >>
    > >
    > > patch
    > > --- linux-2.6.21.1/drivers/ide/legacy/ide-cs.c.orig 2007-05-02 12:09:57.000000000 +0100
    > > +++ linux-2.6.21.1/drivers/ide/legacy/ide-cs.c 2007-05-02 12:12:40.000000000 +0100
    > > @@ -362,6 +362,7 @@
    > > PCMCIA_DEVICE_MANF_CARD(0x000a, 0x0000), /* I-O Data CFA */
    > > PCMCIA_DEVICE_MANF_CARD(0x001c, 0x0001), /* Mitsubishi CFA */
    > > PCMCIA_DEVICE_MANF_CARD(0x0032, 0x0704),
    > > + PCMCIA_DEVICE_MANF_CARD(0x0032, 0x2904), /* KME KXLCOO5 JVC MP-CDX1 */
    > > PCMCIA_DEVICE_MANF_CARD(0x0045, 0x0401), /* SanDisk CFA */
    > > PCMCIA_DEVICE_MANF_CARD(0x0098, 0x0000), /* Toshiba */
    > > PCMCIA_DEVICE_MANF_CARD(0x00a4, 0x002d),
    > >
    > >
    > >
    >
    > Best Regards
    > Komuro

    I rebuilt the kernel with the lock dependency checking turned on, which
    shows up 2 problems (and also breaks the deadlock).

    kernel: pccard: card ejected from slot 0
    kernel:
    kernel: ======================================================
    kernel: [ INFO: hard-safe -> hard-unsafe lock order detected ]
    kernel: 2.6.21.1rsk #2
    kernel: ------------------------------------------------------
    kernel: pccardctl/3066 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
    kernel: (resource_lock){--..}, at: [<c04222e4>] __release_region+0x32/0xff
    kernel:
    kernel: and this task is already holding:
    kernel: (ide_lock){++..}, at: [<c054c2a5>] ide_unregister+0x112/0x573
    kernel: which would create a new lock dependency:
    kernel: (ide_lock){++..} -> (resource_lock){--..}
    kernel:
    kernel: but this new dependency connects a hard-irq-safe lock:
    kernel: (ide_lock){++..}
    kernel: ... which became hard-irq-safe at:
    kernel: [<c0430cdb>] clocksource_get_next+0x39/0x3f
    kernel: [<c0430cac>] clocksource_get_next+0xa/0x3f
    kernel: [<c0434fce>] __lock_acquire+0x3b9/0xb83
    kernel: [<c054e236>] ide_intr+0x15/0x1ba
    kernel: [<c04356fe>] __lock_acquire+0xae9/0xb83
    kernel: [<c04083bd>] mask_and_ack_8259A+0x1b/0xce
    kernel: [<c04357ff>] lock_acquire+0x67/0x81
    kernel: [<c054e236>] ide_intr+0x15/0x1ba
    kernel: [<c0600e95>] _spin_lock_irqsave+0x32/0x41
    kernel: [<c054e236>] ide_intr+0x15/0x1ba
    kernel: [<c054e236>] ide_intr+0x15/0x1ba
    kernel: [<c0448299>] handle_level_irq+0x6c/0xbb
    kernel: [<c044701e>] handle_IRQ_event+0x13/0x3d
    kernel: [<c04482a2>] handle_level_irq+0x75/0xbb
    kernel: [<c044822d>] handle_level_irq+0x0/0xbb
    kernel: [<c0406c4f>] do_IRQ+0xa5/0xca
    kernel: [<ffffffff>] 0xffffffff
    kernel:
    kernel: to a hard-irq-unsafe lock:
    kernel: (resource_lock){--..}
    kernel: ... which became hard-irq-unsafe at:
    kernel: ... [<c0409ba5>] save_stack_trace+0x1c/0x37
    kernel: [<c0422290>] request_resource+0x10/0x32
    kernel: [<c043506b>] __lock_acquire+0x456/0xb83
    kernel: [<c0422290>] request_resource+0x10/0x32
    kernel: [<c04356fe>] __lock_acquire+0xae9/0xb83
    kernel: [<c05202bb>] tty_register_ldisc+0x1c/0x5d
    kernel: [<c0430df6>] clocksource_register+0x4a/0x16e
    kernel: [<c04357ff>] lock_acquire+0x67/0x81
    kernel: [<c0422290>] request_resource+0x10/0x32
    kernel: [<c0600bff>] _write_lock+0x29/0x34
    kernel: [<c0422290>] request_resource+0x10/0x32
    kernel: [<c0422290>] request_resource+0x10/0x32
    kernel: [<c04ef604>] vgacon_startup+0x171/0x2fe
    kernel: [<c0736e4f>] con_init+0x17/0x213
    kernel: [<c05202f5>] tty_register_ldisc+0x56/0x5d
    kernel: [<c073695f>] console_init+0x1b/0x28
    kernel: [<c071a940>] start_kernel+0x1a1/0x3c6
    kernel: [<c071a42b>] unknown_bootoption+0x0/0x202
    kernel: [<ffffffff>] 0xffffffff

    << snipped lots more lock info >>

    kernel: BUG: sleeping function called from invalid context at kernel/rwsem.c:20
    kernel: in_atomic():0, irqs_disabled():1
    kernel: INFO: lockdep is turned off.
    kernel: irq event stamp: 2258
    kernel: hardirqs last enabled at (2257): [<c0462050>] kfree+0x78/0x7f
    kernel: hardirqs last disabled at (2258): [<c0600db5>] _spin_lock_irq+0xc/0x3a
    kernel: softirqs last enabled at (2252): [<c0406b41>] do_softirq+0x4d/0xb6
    kernel: softirqs last disabled at (2243): [<c0406b41>] do_softirq+0x4d/0xb6
    kernel: [<c042fda6>] down_read+0x15/0x4d
    kernel: [<c04e2498>] pci_get_subsys+0x68/0xea
    kernel: [<c04e2530>] pci_get_device+0x16/0x19
    kernel: [<c054b6f6>] init_hwif_default+0x28/0xf0
    kernel: [<c054c3d5>] ide_unregister+0x242/0x573
    kernel: [<d7b68018>] ide_release+0x18/0x28 [ide_cs]
    kernel: [<d7b68030>] ide_detach+0x8/0x14 [ide_cs]
    kernel: [<c055cd0c>] pcmcia_device_remove+0x50/0xb5
    kernel: [<c0543c50>] __device_release_driver+0x71/0x8e
    kernel: [<c05440a5>] device_release_driver+0x31/0x46
    kernel: [<c0543678>] bus_remove_device+0x70/0x80
    kernel: [<c0541d87>] device_del+0x162/0x1c6
    kernel: [<c0541df3>] device_unregister+0x8/0x10
    kernel: [<c055c95c>] pcmcia_card_remove+0x58/0x77
    kernel: [<c055d4da>] ds_event+0x56/0x87
    kernel: [<c04d5181>] kobject_get+0xf/0x13
    kernel: [<c05590e2>] send_event+0x31/0x49
    kernel: [<c05592c1>] socket_shutdown+0xc/0xb3
    kernel: [<c0559384>] socket_remove+0x1c/0x26
    kernel: [<c05593cd>] pcmcia_eject_card+0x3f/0x4c
    kernel: [<c055bcfc>] pccard_store_eject+0x1b/0x22
    kernel: [<c055bce1>] pccard_store_eject+0x0/0x22
    kernel: [<c054172b>] dev_attr_store+0x27/0x2c
    kernel: [<c049b74b>] sysfs_write_file+0xbf/0xe8
    kernel: [<c049b68c>] sysfs_write_file+0x0/0xe8
    kernel: [<c0465ef1>] vfs_write+0xa8/0x154
    kernel: [<c0466430>] sys_write+0x41/0x67
    kernel: [<c0404c1a>] sysenter_past_esp+0x5f/0x99
    kernel: =======================

    Cheers
    Richard

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