2.6.23-rc8-mm2: OOPS in mmc on boot

[Don Mullis <dwm@meer.net>]

OOPS followed by a 3 minute timeout, then completion of boot.
Not seen if card (Kingston microSD adapter) is ejected; not seen in 2.6.23-rc8.
Running on a Dell XPS M1330 laptop.

`dmesg` reports:

[   13.695045] mmcblk0: mmc0:e95c SD02G 1966080KiB
[   13.695155]  mmcblk0: p1
[   13.706907] BUG: unable to handle kernel paging request at virtual address 6b6b6b7a
[   13.707026] printing eip: c01f09f0 *pde = 00000000
[   13.707174] Oops: 0000 [#1] SMP
[   13.707326] last sysfs file: /class/mmc_host/mmc0/mmc0:e95c/serial
[   13.707389] Modules linked in: mmc_block sr_mod iwl4965 cdrom serio_raw mac80211 piix sdhci pcspkr psmouse ide_core iTCO_wdt iTCO_vendor_support watchdog_core watchdog_dev cfg80211 mmc_core shpchp pci_hotplug intel_agp agpgart battery ac power_supply button evdev ata_generic ext3 jbd mbcache sg sd_mod usbhid hid ahci ata_piix libata scsi_mod ohci1394 tg3 ieee1394 ehci_hcd uhci_hcd thermal processor fan fuse
[   13.709649]
[   13.709705] Pid: 4089, comm: mmcqd Not tainted (2.6.23-rc8-mm2 #27)
[   13.709767] EIP: 0060:[<c01f09f0>] EFLAGS: 00010206 CPU: 0
[   13.709831] EIP is at blk_rq_map_sg+0xc0/0x160
[   13.709889] EAX: 04b6a000 EBX: c4a030e0 ECX: 04b6b000 EDX: c1000000
[   13.709951] ESI: 6b6b6b6a EDI: c11535d0 EBP: c4971e30 ESP: c4971df4
[   13.710013]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[   13.710074] Process mmcqd (pid: 4089, ti=c4970000 task=c387b660 task.ti=c4970000)
[   13.710137] last branch before last exception/interrupt
[   13.710249]  from c0129bf8 (vprintk+0x1d8/0x340)
[   13.710359]  to c0129c9c (vprintk+0x27c/0x340)
[   13.710453] Stack: c4971e08 c013d85f c48a0440 00002000 04b6c000 c3914180 00000001 00000001
[   13.710920]        00001000 00000000 c4923700 01000000 c48ca3a0 c48f6d88 c48f6d88 c4971e40
[   13.711390]        f8c39e58 c48f6d88 c4a9f020 c4971fbc f8c396c9 c017de04 00000004 c4971e84
[   13.711857] Call Trace:
[   13.711971]  [<f8c39e58>] mmc_queue_map_sg+0x28/0xc0 [mmc_block]
[   13.712085]  [<f8c396c9>] mmc_blk_issue_rq+0x199/0x780 [mmc_block]
[   13.712193]  [<f8c3a168>] mmc_queue_thread+0x78/0xe0 [mmc_block]
[   13.712309]  [<c013d382>] kthread+0x42/0x70
[   13.712415]  [<c0104e73>] kernel_thread_helper+0x7/0x14
[   13.712523]  =======================
[   13.712584] Code: 0c 03 4f 08 8b 7f 04 01 cf 89 7d d4 8b 3b 89 f8 29 d0 c1 f8 03 69 c0 39 8e e3 38 c1 e0 0c 03 43 08 39 45 d4 74 73 90 8d 74 26 00 <8b> 46 10 8d 4e 10 89 3e 89 c2 83 e2 fe a8 01 8b 45 e4 0f 45 ca
[   13.715555] EIP: [<c01f09f0>] blk_rq_map_sg+0xc0/0x160 SS:ESP 0068:c4971df4
[   13.845668] Synaptics Touchpad, model: 1, fw: 6.3, id: 0x1c0b1, caps: 0xa04753/0x200000
[   13.879914] input: SynPS/2 Synaptics TouchPad as /class/input/input7
[  192.162711] Adding 2731008k swap on /dev/sda7.  Priority:-1 extents:1 across:2731008k


`lspci -vvv` reports:

03:01.1 Generic system peripheral [0805]: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22) (prog-if 01)
        Subsystem: Dell Unknown device 0209
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 64, Cache Line Size: 64 bytes
        Interrupt: pin B routed to IRQ 22
        Region 0: Memory at fe4ff400 (32-bit, non-prefetchable) [size=256]
        Capabilities: [80] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=2 PME-

03:01.2 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 12)
        Subsystem: Dell Unknown device 0209
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 64, Cache Line Size: 64 bytes
        Interrupt: pin B routed to IRQ 4
        Region 0: Memory at fe4ff500 (32-bit, non-prefetchable) [size=256]
        Capabilities: [80] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=2 PME-

03:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 12)
        Subsystem: Dell Unknown device 0209
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 64, Cache Line Size: 64 bytes
        Interrupt: pin B routed to IRQ 4
        Region 0: Memory at fe4ff600 (32-bit, non-prefetchable) [size=256]
        Capabilities: [80] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=2 PME-

03:01.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 12)
        Subsystem: Dell Unknown device 0209
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 64, Cache Line Size: 64 bytes
        Interrupt: pin B routed to IRQ 4
        Region 0: Memory at fe4ff700 (32-bit, non-prefetchable) [size=256]
        Capabilities: [80] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=2 PME-



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