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ACPICA: Fix acpi_evaluate_object_typed()

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Commit 2d2a954375 (ACPICA: Update two error messages to emit
control method name) causes acpi_evaluate_object_typed() to fail
if its pathname argument is NULL, but some callers of that function
in the kernel, particularly acpi_nondev_subnode_data_ok(), pass
NULL as pathname to it and expect it to work.

For this reason, make acpi_evaluate_object_typed() check if its
pathname argument is NULL and fall back to using the pathname of
its handle argument if that is the case.

Reported-by: Sakari Ailus <sakari.ailus@intel.com>
Tested-by: Yang, Hyungwoo <hyungwoo.yang@intel.com>
Fixes: 2d2a954375 (ACPICA: Update two error messages to emit control method name)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2017-08-22 22:44:13 +02:00
parent 14ccee78fc
commit 9b40eebcd3
1 changed files with 7 additions and 3 deletions
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4
drivers/acpi/acpica/nsxfeval.c
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@ -100,10 +100,14 @@ acpi_evaluate_object_typed(acpi_handle handle,
free_buffer_on_error = TRUE;
}
if (pathname) {
status = acpi_get_handle(handle, pathname, &target_handle);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
} else {
target_handle = handle;
}
full_pathname = acpi_ns_get_external_pathname(target_handle);
if (!full_pathname) {