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ACPICA: Add a comment, no functional change

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ACPICA commit d586c29a026a6172c1113df4d75fd6d764196e77

Describe 2nd byte of the end_tag resource descriptor.

Link: https://github.com/acpica/acpica/commit/d586c29a
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore 2017-08-03 14:26:38 +08:00 committed by Rafael J. Wysocki
parent 6d9229d67d
commit 583abc9bd5
1 changed files with 7 additions and 0 deletions
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7
drivers/acpi/acpica/utresrc.c
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@ -239,6 +239,13 @@ acpi_ut_walk_aml_resources(struct acpi_walk_state *walk_state,
return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
}
/*
* Don't attempt to perform any validation on the 2nd byte.
* Although all known ASL compilers insert a zero for the 2nd
* byte, it can also be a checksum (as per the ACPI spec),
* and this is occasionally seen in the field. July 2017.
*/
/* Return the pointer to the end_tag if requested */
if (!user_function) {