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SubjectRe: [GIT PULL] ACPI fix for v4.18-rc7
My XPS13 laptop is unhappy with something recent.

As of yesterday, I get this at bootup:

ACPI: Added _OSI(Module Device)
ACPI: Added _OSI(Processor Device)
ACPI: Added _OSI(3.0 _SCP Extensions)
ACPI: Added _OSI(Processor Aggregator Device)
ACPI: Added _OSI(Linux-Dell-Video)
ACPI Error: Result stack is empty! State=(____ptrval____)
(20180531/dswstate-65)
ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand
(20180531/dsutils-612)
ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0
(20180531/dsutils-727)
ACPI Error: Result stack is empty! State=(____ptrval____)
(20180531/dswstate-65)
ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand
(20180531/dsutils-612)
ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0
(20180531/dsutils-727)
ACPI Error: Result stack is empty! State=(____ptrval____)
(20180531/dswstate-65)
ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand
(20180531/dsutils-612)
ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0
(20180531/dsutils-727)
ACPI Error: Result stack is empty! State=(____ptrval____)
(20180531/dswstate-65)
ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand
(20180531/dsutils-612)
ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0
(20180531/dsutils-727)
ACPI Error: Result stack is empty! State=(____ptrval____)
(20180531/dswstate-65)
ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand
(20180531/dsutils-612)
ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0
(20180531/dsutils-727)
ACPI Error: Result stack is empty! State=(____ptrval____)
(20180531/dswstate-65)
ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand
(20180531/dsutils-612)
ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0
(20180531/dsutils-727)
ACPI Error: Result stack is empty! State=(____ptrval____)
(20180531/dswstate-65)
ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand
(20180531/dsutils-612)
ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0
(20180531/dsutils-727)
ACPI Error: Result stack is empty! State=(____ptrval____)
(20180531/dswstate-65)
ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand
(20180531/dsutils-612)
ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0
(20180531/dsutils-727)
ACPI Error: Result stack is empty! State=(____ptrval____)
(20180531/dswstate-65)
ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand
(20180531/dsutils-612)
ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0
(20180531/dsutils-727)
ACPI Error: Result stack is empty! State=(____ptrval____)
(20180531/dswstate-65)
ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand
(20180531/dsutils-612)
ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0
(20180531/dsutils-727)
ACPI Error: Result stack is empty! State=(____ptrval____)
(20180531/dswstate-65)
ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand
(20180531/dsutils-612)
ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0
(20180531/dsutils-727)
ACPI: 9 ACPI AML tables successfully acquired and loaded

It does *not* happen in

Linux version 4.18.0-rc6-00110-g6e77b267723c

but it *does* happen in

Linux version 4.18.0-rc6-00152-gcd3f77d74ac3

and while I didn't bisect it, I'm assuming it's due to 73c2a01c52b6
("ACPICA: AML Parser: ignore dispatcher error status during table
load")

Ideas?

Note only the errors are new. On older kernels, I just get:

ACPI: Added _OSI(Module Device)
ACPI: Added _OSI(Processor Device)
ACPI: Added _OSI(3.0 _SCP Extensions)
ACPI: Added _OSI(Processor Aggregator Device)
ACPI: Added _OSI(Linux-Dell-Video)
ACPI: 9 ACPI AML tables successfully acquired and loaded

without the big slew of errors.

Linus

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