Date:	Sat, 18 Aug 2007 11:07:55 +0400
From:	Andrey Borzenkov <arvidjaar@...l.ru>
To:	linux-serial@...r.kernel.org,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	Bjorn Helgaas <bjorn.helgaas@...com>
Cc:	linux-kernel@...r.kernel.org
Subject: [2.6.23-rc3 possible regression] 8250 claims nonexisting device blocking IO port

This is related to thread "2.6.22-rc: regression: no irda0 interface (2.6.21 
was OK), smsc does not find chip" but it is already way too overloaded.

In 2.6.23 smsc-ircc2 fails to initialize IrDA controller. Apparently because 
it by default is using the same IO port as ttyS3 and this is now claimed by 
8250.

2.6.22:

[  469.821782] Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ 
sharing enabled
[  469.853873] Yenta: ISA IRQ mask 0x04b8, PCI irq 11
[  469.853890] Socket status: 30000007
[  469.858814] ACPI: PCI Interrupt Link [LNKH] enabled at IRQ 11
[  469.858836] ACPI: PCI Interrupt 0000:00:06.0[A] -> Link [LNKH] -> GSI 11 
(level, low) -> IRQ 11
[  469.973485] 00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[  470.233276] pccard: PCMCIA card inserted into slot 0
[  470.262099] NET: Registered protocol family 23
[  470.306381] Detected unconfigured Toshiba laptop with ALi ISA bridge SMSC 
IrDA chip, pre-configuring device.
[  470.306415] Activated ALi 1533 ISA bridge port 0x02e8.
[  470.306427] Activated ALi 1533 ISA bridge port 0x02f8.
[  470.306649] found SMC SuperIO Chip (devid=0x5a rev=00 base=0x002e): 
LPC47N227
[  470.306681] smsc_superio_flat(): fir: 0x2f8, sir: 0x2e8, dma: 03, irq: 7, 
mode: 0x0e
[  470.306716] SMsC IrDA Controller found
[  470.306719]  IrCC version 2.0, firport 0x2f8, sirport 0x2e8 dma=3, irq=7
[  470.306917] No transceiver found. Defaulting to Fast pin select
[  470.307472] IrDA: Registered device irda0

2.6.23:

[  527.077955] Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ 
sharing enabled
[  527.078628] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[  527.080142] serial8250: ttyS3 at I/O 0x2e8 (irq = 3) is a 16550A
[  527.129869] usbcore: registered new device driver usb
[  527.153849] e100: Intel(R) PRO/100 Network Driver, 3.5.23-k4-NAPI
[  527.153867] e100: Copyright(c) 1999-2006 Intel Corporation
[  527.155556] ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 11
[  527.155570] ACPI: PCI Interrupt 0000:00:0a.0[A] -> Link [LNKD] -> GSI 11 
(level, low) -> IRQ 11
[  527.350234] e100: eth0: e100_probe: addr 0xf7efd000, irq 11, MAC addr 
00:00:39:D7:14:A1
[  527.350406] Yenta: CardBus bridge found at 0000:00:10.0 [12a3:ab01]
[  527.350466] Yenta: Using CSCINT to route CSC interrupts to PCI
[  527.350474] Yenta: Routing CardBus interrupts to PCI
[  527.350489] Yenta TI: socket 0000:00:10.0, mfunc 0x01000002, devctl 0x60
[  527.420546] 00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[  527.443070] ohci_hcd: 2006 August 04 USB 1.1 'Open' Host Controller (OHCI) 
Driver
[  527.580072] Yenta: ISA IRQ mask 0x0000, PCI irq 11
[  527.580091] Socket status: 30000059
[  527.630514] NET: Registered protocol family 23
[  527.704313] Yenta: CardBus bridge found at 0000:00:11.0 [1179:0001]
[  527.774824] Detected unconfigured Toshiba laptop with ALi ISA bridge SMSC 
IrDA chip, pre-configuring device.
[  527.774863] Activated ALi 1533 ISA bridge port 0x02e8.
[  527.774878] Activated ALi 1533 ISA bridge port 0x02f8.
[  527.775087] found SMC SuperIO Chip (devid=0x5a rev=00 base=0x002e): 
LPC47N227
[  527.775121] smsc_superio_flat(): fir: 0x2f8, sir: 0x2e8, dma: 03, irq: 7, 
mode: 0x0e
[  527.775145] smsc_ircc_present: can't get sir_base of 0x2e8

I attach full dmesg from 2.6.22 and 2.6.23 as well as kernel config. The 
following is on 2.6.23:

{pts/1}% lspnp -vvv
00:00 PNP0c01 System board
    state = active
    allocated resources:
        mem 0x0-0x9ffff
        mem 0xe0000-0xeffff
        mem 0xf0000-0xfffff
        mem 0x100000-0x1ef5ffff

00:01 PNP0a03 PCI bus
    state = active
    allocated resources:
        io 0xcf8-0xcff

00:02 PNP0200 AT DMA controller
    state = active
    allocated resources:
        io 0x0-0xf
        io 0x81-0x83
        io 0x87-0x87
        io 0x89-0x8b
        io 0x8f-0x8f
        io 0xc0-0xdf
        dma 4

00:03 PNP0800 AT speaker
    state = active
    allocated resources:
        io 0x61-0x61

00:04 PNP0c04 Math coprocessor
    state = active
    allocated resources:
        io 0xf0-0xff
        irq 13

00:05 PNP0303 IBM enhanced keyboard (101/102-key, PS/2 mouse support)
    state = active
    allocated resources:
        io 0x60-0x60
        io 0x64-0x64
        irq 1

00:06 PNP0f13 PS/2 port for PS/2-style mice
    state = active
    allocated resources:
        irq 12

00:07 PNP0b00 AT real-time clock
    state = active
    allocated resources:
        io 0x70-0x71
        irq 8

00:08 PNP0c02 Motherboard resources
    state = active
    allocated resources:
        io 0x2e-0x2f
        io 0x62-0x62
        io 0x66-0x66
        io 0x80-0x80
        io 0x84-0x86
        io 0x88-0x88
        io 0x8c-0x8e
        io 0x92-0x92

00:09 PNP0501 16550A-compatible serial port
    state = active
    allocated resources:
        io 0x3f8-0x3ff
        irq 4
    possible resources:
        irq 3,4,5,6,7,10,11 High-Edge
        Dependent: 01 - Priority acceptable
           port 0x3f8-0x3f8, align 0x0, size 0x8, 16-bit address decoding
        Dependent: 02 - Priority acceptable
           port 0x2f8-0x2f8, align 0x0, size 0x8, 16-bit address decoding
        Dependent: 03 - Priority acceptable
           port 0x2e8-0x2e8, align 0x0, size 0x8, 16-bit address decoding
        Dependent: 04 - Priority acceptable
           port 0x3e8-0x3e8, align 0x0, size 0x8, 16-bit address decoding

00:0a SMCf010 SMC Fast Infrared Port
    state = active
    allocated resources:
        io 0x2e8-0x2ef
        io 0x100-0x107
        irq 5
        dma 1
    possible resources:
        port 0x100-0x130, align 0xf, size 0x8, 16-bit address decoding
        irq 3,4,5,6,7,10,11 High-Edge
        dma 1,2,3 16-bit compatible
        Dependent: 01 - Priority acceptable
           port 0x3f8-0x3f8, align 0x0, size 0x8, 16-bit address decoding
        Dependent: 02 - Priority acceptable
           port 0x2e8-0x2e8, align 0x0, size 0x8, 16-bit address decoding
        Dependent: 03 - Priority acceptable
           port 0x2f8-0x2f8, align 0x0, size 0x8, 16-bit address decoding
        Dependent: 04 - Priority acceptable
           port 0x3e8-0x3e8, align 0x0, size 0x8, 16-bit address decoding

00:0b PNP0401 ECP printer port
    state = active
    allocated resources:
        io 0x378-0x37a
        io 0x778-0x77a
        irq 7
        dma 3
    possible resources:
        dma 1,2,3 8-bit compatible
        Dependent: 01 - Priority acceptable
           port 0x378-0x378, align 0x0, size 0x3, 16-bit address decoding
           port 0x778-0x778, align 0x0, size 0x3, 16-bit address decoding
           irq 7 High-Edge
        Dependent: 02 - Priority acceptable
           port 0x278-0x278, align 0x0, size 0x3, 16-bit address decoding
           port 0x678-0x678, align 0x0, size 0x3, 16-bit address decoding
           irq 5 High-Edge
        Dependent: 03 - Priority acceptable
           port 0x3bc-0x3bc, align 0x0, size 0x3, 16-bit address decoding
           port 0x7bc-0x7bc, align 0x0, size 0x3, 16-bit address decoding
           irq 7 High-Edge

{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)

View attachment "dmesg.2.6.22" of type "text/plain" (25805 bytes)

View attachment "dmesg.2.6.23" of type "text/plain" (26389 bytes)

View attachment "config-2.6.22-2avb" of type "text/plain" (47521 bytes)

View attachment "config-2.6.23-rc3-2avb" of type "text/plain" (49683 bytes)

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