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To: Manuel Serrano <Manuel.Serrano@sophia.inria.fr>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Fw: Troubles with Sony PCG-C1MHP (crusoe based and ALIM 1533 drivers)
References: <20021120094121.7b6c7d34.Manuel.Serrano@sophia.inria.fr>
	<1037800851.3241.10.camel@irongate.swansea.linux.org.uk>
	<20021122113904.0052e208.Manuel.Serrano@sophia.inria.fr>
From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Date: Fri, 22 Nov 2002 23:53:33 +0900
In-Reply-To: <20021122113904.0052e208.Manuel.Serrano@sophia.inria.fr>
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Manuel Serrano <Manuel.Serrano@sophia.inria.fr> writes:

> Stack: 000000ff 00000001 c029da4c c019ed05 000000ff 00000001 c1a13fa0 c029da4c
>        0000e000 00000286 c019f91c c029da4c c0275554 c0267fd8 00000000 00000001
>        00000001 00000001 00000001 00000001 00000001 00000001 00000001 00000001
> Call Trace:   [<c019ed05>] [<c019f91c>] [<c0105021>] [<c01054a9>]
> Code: 0b 40 10 ff d0 83 c4 04 56 9d 83 3d 84 dc 27 c0 00 75 0f 89
> 
> 
> >>EIP; c0107cab <disable_irq+2f/54>   <=====
> 
> >>edi; c029da4c <ide_hwifs+46c/2c38>

Looks like the same problem on my VAIO-U3. The following log is on
2.5.47.

ACPI: PCI Interrupt Link [LNK6] enabled at IRQ 9
ACPI: PCI Interrupt Link [LNK7] enabled at IRQ 9
ACPI: No IRQ known for interrupt pin A of device 00:10.0 - using IRQ 255
PCI: Using ACPI for IRQ routing

[...]

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
ALI15X3: IDE controller at PCI slot 00:10.0
ACPI: No IRQ known for interrupt pin A of device 00:10.0 - using IRQ 255
ALI15X3: chipset revision 196
ALI15X3: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0x1400-0x1407, BIOS settings: hda:DMA, hdb:pio
ALI15X3: simplex device: DMA forced
    ide1: BM-DMA at 0x1408-0x140f, BIOS settings: hdc:DMA, hdd:DMA
hda: TOSHIBA MK2003GAH, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hda: host protected area => 1
hda: 39062520 sectors (20000 MB), CHS=2431/255/63, UDMA(100)
 hda: hda1 hda2 hda3
register interface 'mouse' with class 'input

It seems ACPI assigned 255 to IRQ, so disable_irq() did oops.
The following is my stupid patch. I hope this info helps.

--- linux-2.5.47/drivers/ide/ide-probe.c~ide-kludge	2002-11-14 02:41:40.000000000 +0900
+++ linux-2.5.47-hirofumi/drivers/ide/ide-probe.c	2002-11-14 02:41:40.000000000 +0900
@@ -654,6 +654,8 @@ void probe_hwif (ide_hwif_t *hwif)
 	 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
 	 * we'll install our IRQ driver much later...
 	 */
+	if (hwif->irq == 255)
+		hwif->irq = 0;
 	irqd = hwif->irq;
 	if (irqd)
 		disable_irq(hwif->irq);
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
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