Re: [BUG] PATA_PCMCIA does not work

Jeff Garzik
2007-02-25T01:45:27Z

Komuro wrote:
> Hi,
>
> The pata_pcmcia problem is fixed. Thanks!
> (I tested it on kernel 2.6.20-git14)
>
> But kernel 2.6.20-mm2 introduced new oops
> when I insert the pata_pcmcia device.
>
>
> 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
> BUG: unable to handle kernel NULL pointer dereference at virtual address 0000004d
> printing eip:
> d8a1b10e
> *pde = 00000000
> Oops: 0000 [#1]
> last sysfs file: /block/hda/size
> Modules linked in: pata_pcmcia libata scsi_mod dm_mirror dm_multipath dm_mod pcmcia yenta_socket rsrc_nonstatic pcmcia_core
> CPU: 0
> EIP: 0060:[<d8a1b10e>] Not tainted VLI
> EFLAGS: 00010296 (2.6.20-mm2 #1)
> EIP is at ata_acpi_exec_tfs+0x157/0x8ad [libata]
> eax: 00000001 ebx: 00000000 ecx: d6d43c84 edx: d6d43c84
> esi: d51f4514 edi: 00000000 ebp: d51f438c esp: d6f2bcdc
> ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068
> Process scsi_eh_0 (pid: 1647, ti=d6f2a000 task=c13c9a70 task.ti=d6f2a000)
> Stack: d51f6190 00000246 00000246 00000000 d8a130b7 00000000 00000000 00000000
> 00000000 d6f2bd48 d6f2bdf0 d51f4514 ec000000 d51f6190 00000000 00000000
> 00000000 00000246 d6d43c84 00000000 00000000 00000000 00000000 ffffffff
> Call Trace:
> [<d8a130b7>] ata_exec_internal_sg+0x3ae/0x3b8 [libata]
> [<d8a125f8>] ata_dev_configure+0xc1/0x7d2 [libata]
> [<d8a10e87>] ata_dev_select+0xce/0x11a [libata]

Any chance you could insert some printk() calls into ata_apci_exec_tfs?
ata_exec_internal_sg() never calls that function, so I'm curious if
something corrupted memory a bit, or what happened.

In any case, I'm surprised that ACPI would be executing taskfiles on
PCMCIA anyway.

Jeff