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    SubjectRe: 2.6.22-rc: regression: no irda0 interface (2.6.21 was OK), smsc does not find chip
    Date
    On Sunday 03 June 2007, Andrey Borzenkov wrote:
    > Under 2.6.22-rc I lost irda0 interface - smsc claims no device present.
    > Nothing was changed in setup except kernel version.
    >
    > 2.6.21:
    >
    > Detected unconfigured Toshiba laptop with ALi ISA bridge SMSC IrDA chip,
    > pre-configuring device.
    > Activated ALi 1533 ISA bridge port 0x02e8.
    > Activated ALi 1533 ISA bridge port 0x02f8.
    > found SMC SuperIO Chip (devid=0x5a rev=00 base=0x002e): LPC47N227
    > smsc_superio_flat(): IrDA not enabled
    > smsc_superio_flat(): fir: 0x2f8, sir: 0x2e8, dma: 03, irq: 7, mode: 0x02
    > SMsC IrDA Controller found
    > IrCC version 2.0, firport 0x2f8, sirport 0x2e8 dma=3, irq=7
    > No transceiver found. Defaulting to Fast pin select
    > IrDA: Registered device irda0
    >
    >
    > 2.6.22-rc3:
    > Detected unconfigured Toshiba laptop with ALi ISA bridge SMSC IrDA chip,
    > pre-configuring device.
    > Activated ALi 1533 ISA bridge port 0x02e8.
    > Activated ALi 1533 ISA bridge port 0x02f8.
    > pnp: Device 00:0a activated.
    > smsc_ircc_present(), addr 0x02e8 - no device found!
    > pnp: Device 00:0a disabled.
    >
    > I Cc Adam because of pnp messages in this case - they were not present in
    > 2.6.21 so something is being done differently now.
    >
    > Some more info:
    >
    > {pts/1}% cat /sys/bus/pnp/devices/00:0a/id
    > SMCf010
    > {pts/1}% lspci -nn
    > 00:00.0 Host bridge [0600]: ALi Corporation M1644/M1644T
    > Northbridge+Trident [10b9:1644] (rev 01)
    > 00:01.0 PCI bridge [0604]: ALi Corporation PCI to AGP Controller
    > [10b9:5247] 00:02.0 USB Controller [0c03]: ALi Corporation USB 1.1
    > Controller [10b9:5237] (rev 03)
    > 00:04.0 IDE interface [0101]: ALi Corporation M5229 IDE [10b9:5229] (rev
    > c3) 00:06.0 Multimedia audio controller [0401]: ALi Corporation M5451 PCI
    > AC-Link Controller Audio Device [10b9:5451] (rev 01)
    > 00:07.0 ISA bridge [0601]: ALi Corporation M1533/M1535 PCI to ISA Bridge
    > [Aladdin IV/V/V+] [10b9:1533]
    > 00:08.0 Bridge [0680]: ALi Corporation M7101 Power Management Controller
    > [PMU] [10b9:7101]
    > 00:0a.0 Ethernet controller [0200]: Intel Corporation 82557/8/9 [Ethernet
    > Pro 100] [8086:1229] (rev 08)
    > 00:10.0 CardBus bridge [0607]: Texas Instruments PCI1410 PC card Cardbus
    > Controller [104c:ac50] (rev 01)
    > 00:11.0 CardBus bridge [0607]: Toshiba America Info Systems ToPIC100 PCI to
    > Cardbus Bridge with ZV Support [1179:0617] (rev 32)
    > 00:11.1 CardBus bridge [0607]: Toshiba America Info Systems ToPIC100 PCI to
    > Cardbus Bridge with ZV Support [1179:0617] (rev 32)
    > 00:12.0 System peripheral [0880]: Toshiba America Info Systems SD TypA
    > Controller [1179:0805] (rev 03)
    > 01:00.0 VGA compatible controller [0300]: Trident Microsystems CyberBlade
    > XPAi1 [1023:8820] (rev 82)
    >
    > config from 2.6.22-rc3 attached.
    >

    Adding "nopnp" parameters finds device just fine so it is apparently result of
    this commit:

    commit d0d4f69bb65a8c1c1430c577a583632709b874c6
    Author: Bjorn Helgaas <bjorn.helgaas@hp.com>
    Date: Tue May 8 00:36:05 2007 -0700

    smsc-ircc2: add PNP support

    What information is needed to debug it further?

    -andrey
    [unhandled content-type:application/pgp-signature]
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