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authorCarlos Corbacho <carlos@strangeworlds.co.uk>2008-02-24 13:34:34 +0000
committerLen Brown <len.brown@intel.com>2008-03-11 17:59:05 -0400
commita527f2d7fe58ce95bfec998f3dc6f658c777a2f2 (patch)
treec55c8f3366ba0f955619a48e0f0a88ff070247bd /drivers/acpi
parent9b963c40306ba6967650dce99f4e823f1da49a60 (diff)
ACPI: WMI: Clean up handling of spec violating data blocks
Acer violate the ACPI-WMI spec by declaring some of their data blocks as expensive, but with no corresponding WCxx method. There is already some workaround code in to handle the initial WCxx call (we just ignore a failure here); but we need to properly check if the second, "clean up", WCxx call is actually needed or not, rather than fail simply because it isn't there. Signed-off-by: Carlos Corbacho <carlos@strangeworlds.co.uk> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/wmi.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/acpi/wmi.c b/drivers/acpi/wmi.c
index efacc9f8bfe..c33b1c6e93b 100644
--- a/drivers/acpi/wmi.c
+++ b/drivers/acpi/wmi.c
@@ -293,7 +293,7 @@ struct acpi_buffer *out)
{
struct guid_block *block = NULL;
struct wmi_block *wblock = NULL;
- acpi_handle handle;
+ acpi_handle handle, wc_handle;
acpi_status status, wc_status = AE_ERROR;
struct acpi_object_list input, wc_input;
union acpi_object wc_params[1], wq_params[1];
@@ -338,8 +338,10 @@ struct acpi_buffer *out)
* expensive, but have no corresponding WCxx method. So we
* should not fail if this happens.
*/
- wc_status = acpi_evaluate_object(handle, wc_method,
- &wc_input, NULL);
+ wc_status = acpi_get_handle(handle, wc_method, &wc_handle);
+ if (ACPI_SUCCESS(wc_status))
+ wc_status = acpi_evaluate_object(handle, wc_method,
+ &wc_input, NULL);
}
strcpy(method, "WQ");
@@ -351,7 +353,7 @@ struct acpi_buffer *out)
* If ACPI_WMI_EXPENSIVE, call the relevant WCxx method, even if
* the WQxx method failed - we should disable collection anyway.
*/
- if ((block->flags & ACPI_WMI_EXPENSIVE) && wc_status) {
+ if ((block->flags & ACPI_WMI_EXPENSIVE) && ACPI_SUCCESS(wc_status)) {
wc_params[0].integer.value = 0;
status = acpi_evaluate_object(handle,
wc_method, &wc_input, NULL);