diff options
| -rw-r--r-- | drivers/pci/pci-acpi.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 8f923ee5177..c580a525d9c 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -24,13 +24,15 @@ struct acpi_osc_data { acpi_handle handle; u32 support_set; u32 control_set; + int is_queried; + u32 query_result; struct list_head sibiling; }; static LIST_HEAD(acpi_osc_data_list); struct acpi_osc_args { u32 capbuf[3]; - u32 ctrl_result; + u32 query_result; }; static DEFINE_MUTEX(pci_acpi_lock); @@ -112,8 +114,9 @@ static acpi_status acpi_run_osc(acpi_handle handle, goto out_kfree; } out_success: - osc_args->ctrl_result = - *((u32 *)(out_obj->buffer.pointer + 8)); + if (flags & OSC_QUERY_ENABLE) + osc_args->query_result = + *((u32 *)(out_obj->buffer.pointer + 8)); status = AE_OK; out_kfree: @@ -121,8 +124,7 @@ out_kfree: return status; } -static acpi_status __acpi_query_osc(u32 flags, struct acpi_osc_data *osc_data, - u32 *result) +static acpi_status __acpi_query_osc(u32 flags, struct acpi_osc_data *osc_data) { acpi_status status; u32 support_set; @@ -137,7 +139,8 @@ static acpi_status __acpi_query_osc(u32 flags, struct acpi_osc_data *osc_data, status = acpi_run_osc(osc_data->handle, &osc_args); if (ACPI_SUCCESS(status)) { osc_data->support_set = support_set; - *result = osc_args.ctrl_result; + osc_data->query_result = osc_args.query_result; + osc_data->is_queried = 1; } return status; @@ -151,7 +154,6 @@ static acpi_status __acpi_query_osc(u32 flags, struct acpi_osc_data *osc_data, */ int pci_acpi_osc_support(acpi_handle handle, u32 flags) { - u32 dummy; acpi_status status; acpi_handle tmp; struct acpi_osc_data *osc_data; @@ -169,7 +171,7 @@ int pci_acpi_osc_support(acpi_handle handle, u32 flags) goto out; } - __acpi_query_osc(flags, osc_data, &dummy); + __acpi_query_osc(flags, osc_data); out: mutex_unlock(&pci_acpi_lock); return rc; @@ -185,7 +187,7 @@ out: acpi_status pci_osc_control_set(acpi_handle handle, u32 flags) { acpi_status status; - u32 ctrlset, control_set, result; + u32 ctrlset, control_set; acpi_handle tmp; struct acpi_osc_data *osc_data; struct acpi_osc_args osc_args; @@ -208,11 +210,13 @@ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags) goto out; } - status = __acpi_query_osc(osc_data->support_set, osc_data, &result); - if (ACPI_FAILURE(status)) - goto out; + if (!osc_data->is_queried) { + status = __acpi_query_osc(osc_data->support_set, osc_data); + if (ACPI_FAILURE(status)) + goto out; + } - if ((result & ctrlset) != ctrlset) { + if ((osc_data->query_result & ctrlset) != ctrlset) { status = AE_SUPPORT; goto out; } |