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@xxxxxxxx> > To: Linux Kernel list <linux-kernel@xxxxxxxxxxxxxxx> > 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. - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
