Bug 37922

Summary:	ACPI Error: Field [CMDX] at 224 exceeds Buffer [SCBF] size 168 (bits) (20110413/dsopcode-236)
Product:	ACPI	Reporter:	Cristian Aravena Romero (caravena)
Component:	BIOS	Assignee:	acpi_bios
Status:	CLOSED WILL_NOT_FIX
Severity:	normal	CC:	lenb
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	3.0-rc3	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	acpidump

Description Cristian Aravena Romero 2011-06-19 19:49:41 UTC

Open report in launchpad.net:
https://bugs.launchpad.net/bugs/799518

Dmesg:
[ 515.051387] ata1.00: ACPI cmd f5/00:00:00:00:00:00 (SECURITY FREEZE LOCK) filtered out
[ 515.051395] ata1.00: ACPI cmd f5/00:00:00:00:00:00 (SECURITY FREEZE LOCK) filtered out
[ 515.051402] ata1.00: ACPI cmd f5/00:00:00:00:00:00 (SECURITY FREEZE LOCK) filtered out
[ 515.055298] ACPI Error: Field [CMDX] at 224 exceeds Buffer [SCBF] size 168 (bits) (20110413/dsopcode-236)
[ 515.055311] ACPI Error: Method parse/execution failed [\_SB_.PCI0.SATA.GTFB] (Node ffff8800b29616b8), AE_AML_BUFFER_LIMIT (20110413/psparse-536)
[ 515.055328] ACPI Error: Method parse/execution failed [\_SB_.PCI0.SATA.SPT0._SDD] (Node ffff8800b2961578), AE_AML_BUFFER_LIMIT (20110413/psparse-536)
[ 515.055347] ata1.00: ACPI _SDD failed (AE 0x300a)

Comment 1 Cristian Aravena Romero 2011-06-19 19:50:47 UTC

Created attachment 62912 [details]
acpidump

Comment 2 Lin Ming 2011-06-21 02:33:50 UTC

This is a BIOS AML code bug.

        Name (CMDC, 0x00)
        Method (GTFB, 2, Serialized)
        {
            Multiply (CMDC, 0x38, Local0)
            CreateField (SCBF, Local0, 0x38, CMDX)
            Multiply (CMDC, 0x07, Local0)
            CreateByteField (SCBF, Add (Local0, 0x01), A001)
            Store (Arg0, CMDX)
            Store (Arg1, A001)
            Increment (CMDC)
        }

> Increment (CMDC)
CMDC is incremented every time when GTFB called.

> Multiply (CMDC, 0x38, Local0)
> CreateField (SCBF, Local0, 0x38, CMDX)
CreateField fails when CMDC is incremented to 4, because it exceeds the buffer size.