Re: Fw: ata-piix ACPI errors

[Thomas Renninger <trenn@suse.de>]

On Fri, 2007-02-23 at 02:08 -0800, Andrew Morton wrote:
> I'm starting to think that big acpi merge came a bit too soon.
> 
> Begin forwarded message:
> 
> Date: Thu, 22 Feb 2007 15:29:42 +0200 (EET)
> From: Meelis Roos <mroos@linux.ee>
> To: Linux Kernel list <linux-kernel@vger.kernel.org>
> Subject: ata-piix ACPI errors
> 
> 
> Testbooted 2.6.21-rc1+todays git on a PC with Intel 845 chipset and PATA 
> HDD. Works fine but I now have these ACPI errors in dmesg, maybe someone 
> is interested:
> 
> ata_piix 0000:00:1f.1: version 2.00ac7
> PCI: Enabling device 0000:00:1f.1 (0005 -> 0007)
> ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 18 (level, low) -> IRQ 18
> PCI: Setting latency timer of device 0000:00:1f.1 to 64
> ata1: PATA max UDMA/100 cmd 0x000101f0 ctl 0x000103f6 bmdma 0x0001ffa0 irq 14
> ata2: PATA max UDMA/100 cmd 0x00010170 ctl 0x00010376 bmdma 0x0001ffa8 irq 15
> scsi0 : ata_piix
> ACPI Error (dsopcode-0481): Attempt to CreateField of length zero [20070126]
I expect this to be ACPI (interpreter) unrelated and the bug should be
in drivers/ata/libata-acpi.c.
The problem is that libata-acpi.c calls _GTF function before _STM has
been called. This is forbidden by ACPI spec.
The Field is created in _STM. When _GTF is called first, an
uninitialized Field is tried to be accessed. ACPI subsystem behaves
correctly here.

libata.ata_acpi=0
boot param should workaround the bug?

Related/same bugs:
https://bugzilla.novell.com/show_bug.cgi?id=216853
http://bugzilla.kernel.org/show_bug.cgi?id=7907

    Thomas

> ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.RATA] (Node c18edbf8), AE_AML_OPERAND_VALUE
> ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.CHN0.DRV0._GTF] (Node c18ed608), AE_AML_OPERAND_VALUE
> ata1.00: ATA-5: ST380021A, 3.19, max UDMA/100
> ata1.00: 156301488 sectors, multi 16: LBA
> ACPI Error (dsopcode-0481): Attempt to CreateField of length zero [20070126]
> ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.RATA] (Node c18edbf8), AE_AML_OPERAND_VALUE
> ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.CHN0.DRV0._GTF] (Node c18ed608), AE_AML_OPERAND_VALUE
> ata1.00: configured for UDMA/100
> scsi1 : ata_piix
> ACPI Error (dsopcode-0481): Attempt to CreateField of length zero [20070126]
> ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.RATA] (Node c18edbf8), AE_AML_OPERAND_VALUE
> ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.CHN1.DRV0._GTF] (Node c18ed464), AE_AML_OPERAND_VALUE
> ata2.00: ATAPI, max UDMA/33
> ACPI Error (dsopcode-0481): Attempt to CreateField of length zero [20070126]
> ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.RATA] (Node c18edbf8), AE_AML_OPERAND_VALUE
> ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.CHN1.DRV0._GTF] (Node c18ed464), AE_AML_OPERAND_VALUE
> ata2.00: configured for UDMA/33
> scsi 0:0:0:0: Direct-Access     ATA      ST380021A        3.19 PQ: 0 ANSI: 5
> scsi 1:0:0:0: CD-ROM            _NEC     DV-5800B         G9H3 PQ: 0 ANSI: 5
Rest are aftereffects/subsequent faults.