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ACPI: Use ACPICA native way to decode the PLD buffer

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This patch is on top of the ACPICA 20120816 release, which implemented
a native way to decode PLD buffer, so use it instead of leting upper
level users do the decoding.

v2: Modify the check for PLD buffer length to reject buffers whose
length < 16

Signed-off-by: Feng Tang <[email protected]>
Signed-off-by: Bob Moore <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Feng Tang 2012-08-21 09:56:58 +08:00 • committed by Len Brown
commit 8ede06aba5
2 changed files with 8 additions and 34 deletions
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11
drivers/acpi/utils.c
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@ -384,7 +384,7 @@ acpi_evaluate_reference(acpi_handle handle,
EXPORT_SYMBOL(acpi_evaluate_reference);
acpi_status
acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld *pld)
acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld)
{
acpi_status status;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
@ -400,13 +400,16 @@ acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld *pld)
if (!output || output->type != ACPI_TYPE_PACKAGE
|| !output->package.count
|| output->package.elements[0].type != ACPI_TYPE_BUFFER
|| output->package.elements[0].buffer.length > sizeof(*pld)) {
|| output->package.elements[0].buffer.length < ACPI_PLD_REV1_BUFFER_SIZE) {
status = AE_TYPE;
goto out;
}
memcpy(pld, output->package.elements[0].buffer.pointer,
output->package.elements[0].buffer.length);
status = acpi_decode_pld_buffer(
output->package.elements[0].buffer.pointer,
output->package.elements[0].buffer.length,
pld);
out:
kfree(buffer.pointer);
return status;