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| author | Paul Menzel <pmenzel@molgen.mpg.de> | 2022-02-21 22:50:39 +0100 |
|---|---|---|
| committer | Paul Menzel <pmenzel@molgen.mpg.de> | 2022-03-13 08:50:59 +0100 |
| commit | 05ba545ce7859392250b18c10081db25c90ed8d7 (patch) | |
| tree | 9992d235bc01e5190fcd3e19525f5ade5423e733 | |
| parent | b69cbef7a83eadb102a1ff6c6f6fc5abce34805a (diff) | |
| download | acpica-05ba545ce7859392250b18c10081db25c90ed8d7.tar.gz | |
executer/exsystem: Inform users about ACPI spec violation
Values greater than 100 microseconds violate the ACPI specification, so
warn users about it.
From ACPI Specification version 6.2 Errata A, 19.6.128 *Stall (Stall for
a Short Time)*:
> The implementation of Stall is OS-specific, but must not relinquish
> control of the processor. Because of this, delays longer than 100
> microseconds must use Sleep instead of Stall.
| -rw-r--r-- | source/components/executer/exsystem.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/source/components/executer/exsystem.c b/source/components/executer/exsystem.c index aafef2053..7552de835 100644 --- a/source/components/executer/exsystem.c +++ b/source/components/executer/exsystem.c @@ -302,6 +302,11 @@ AcpiExSystemDoStall ( } else { + if (HowLongUS > 100) + { + ACPI_WARNING ((AE_INFO, + "Time parameter %u us > 100 us violating ACPI spec, please fix the firmware.", HowLongUs)); + } AcpiOsStall (HowLongUs); } |