pci-acpi: remove duplicate code for _OSC

Remove the duplicated code in acpi_query_osc() and acpi_run_osc().
It simplifies the code very much.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Acked-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 9d6fc8e6285d0c557a5e1778e468f49066ff4da5..032b3268018bc759c3ce1a0f693c88ffbff902f2 100644 (file)
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -46,40 +46,15 @@ static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle)
 
 static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40, 0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66};
 
-static acpi_status  
-acpi_query_osc (
-       acpi_handle     handle,
-       u32             level,
-       void            *context,
-       void            **retval )
+static acpi_status acpi_run_osc(acpi_handle handle,
+                               struct acpi_osc_data *osc_data)
 {
-       acpi_status             status;
-       struct acpi_object_list input;
-       union acpi_object       in_params[4];
-       struct acpi_buffer      output = {ACPI_ALLOCATE_BUFFER, NULL};
-       union acpi_object       *out_obj;
-       u32                     osc_dw0;
-       acpi_status *ret_status = (acpi_status *)retval;
-       struct acpi_osc_data *osc_data;
-       u32 flags = (unsigned long)context, temp;
-       acpi_handle tmp;
-
-       status = acpi_get_handle(handle, "_OSC", &tmp);
-       if (ACPI_FAILURE(status))
-               return status;
-
-       osc_data = acpi_get_osc_data(handle);
-       if (!osc_data) {
-               printk(KERN_ERR "acpi osc data array is full\n");
-               return AE_ERROR;
-       }
-
-       osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] |= (flags & OSC_SUPPORT_MASKS);
-
-       /* do _OSC query for all possible controls */
-       temp = osc_data->ctrlset_buf[OSC_CONTROL_TYPE];
-       osc_data->ctrlset_buf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
-       osc_data->ctrlset_buf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
+       acpi_status status;
+       struct acpi_object_list input;
+       union acpi_object in_params[4];
+       struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
+       union acpi_object *out_obj;
+       u32 osc_dw0, flags = osc_data->ctrlset_buf[OSC_QUERY_TYPE];
 
        /* Setting up input parameters */
        input.count = 4;
@@ -97,14 +72,13 @@ acpi_query_osc (
 
        status = acpi_evaluate_object(handle, "_OSC", &input, &output);
        if (ACPI_FAILURE(status))
-               goto out_nofree;
-       out_obj = output.pointer;
+               return status;
 
+       out_obj = output.pointer;
        if (out_obj->type != ACPI_TYPE_BUFFER) {
-               printk(KERN_DEBUG  
-                       "Evaluate _OSC returns wrong type\n");
+               printk(KERN_DEBUG "Evaluate _OSC returns wrong type\n");
                status = AE_TYPE;
-               goto query_osc_out;
+               goto out_kfree;
        }
        osc_dw0 = *((u32 *) out_obj->buffer.pointer);
        if (osc_dw0) {
@@ -115,93 +89,64 @@ acpi_query_osc (
                if (osc_dw0 & OSC_INVALID_REVISION_ERROR)
                        printk(KERN_DEBUG "_OSC invalid revision\n"); 
                if (osc_dw0 & OSC_CAPABILITIES_MASK_ERROR) {
-                       /* Update Global Control Set */
-                       osc_data->global_ctrlsets =
-                               *((u32 *)(out_obj->buffer.pointer + 8));
-                       status = AE_OK;
-                       goto query_osc_out;
+                       if (flags & OSC_QUERY_ENABLE)
+                               goto out_success;
+                       printk(KERN_DEBUG "_OSC FW not grant req. control\n");
+                       status = AE_SUPPORT;
+                       goto out_kfree;
                }
                status = AE_ERROR;
-               goto query_osc_out;
+               goto out_kfree;
+       }
+out_success:
+       if (flags & OSC_QUERY_ENABLE) {
+               /* Update Global Control Set */
+               osc_data->global_ctrlsets =
+                       *((u32 *)(out_obj->buffer.pointer + 8));
        }
-
-       /* Update Global Control Set */
-       osc_data->global_ctrlsets = *((u32 *)(out_obj->buffer.pointer + 8));
        status = AE_OK;
 
-query_osc_out:
+out_kfree:
        kfree(output.pointer);
-out_nofree:
-       *ret_status = status;
-
-       osc_data->ctrlset_buf[OSC_QUERY_TYPE] = !OSC_QUERY_ENABLE;
-       osc_data->ctrlset_buf[OSC_CONTROL_TYPE] = temp;
-       if (ACPI_FAILURE(status)) {
-               /* no osc support at all */
-               osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] = 0;
-       }
-
        return status;
 }
 
-
-static acpi_status  
-acpi_run_osc (
-       acpi_handle     handle,
-       void            *context)
+static acpi_status acpi_query_osc(acpi_handle handle,
+                                 u32 level, void *context, void **retval)
 {
-       acpi_status             status;
-       struct acpi_object_list input;
-       union acpi_object       in_params[4];
-       struct acpi_buffer      output = {ACPI_ALLOCATE_BUFFER, NULL};
-       union acpi_object       *out_obj;
-       u32                     osc_dw0;
-
-       /* Setting up input parameters */
-       input.count = 4;
-       input.pointer = in_params;
-       in_params[0].type               = ACPI_TYPE_BUFFER;
-       in_params[0].buffer.length      = 16;
-       in_params[0].buffer.pointer     = OSC_UUID;
-       in_params[1].type               = ACPI_TYPE_INTEGER;
-       in_params[1].integer.value      = 1;
-       in_params[2].type               = ACPI_TYPE_INTEGER;
-       in_params[2].integer.value      = 3;
-       in_params[3].type               = ACPI_TYPE_BUFFER;
-       in_params[3].buffer.length      = 12;
-       in_params[3].buffer.pointer     = (u8 *)context;
+       acpi_status status;
+       acpi_status *ret_status = (acpi_status *)retval;
+       struct acpi_osc_data *osc_data;
+       u32 flags = (unsigned long)context, temp;
+       acpi_handle tmp;
 
-       status = acpi_evaluate_object(handle, "_OSC", &input, &output);
-       if (ACPI_FAILURE (status))
+       status = acpi_get_handle(handle, "_OSC", &tmp);
+       if (ACPI_FAILURE(status))
                return status;
 
-       out_obj = output.pointer;
-       if (out_obj->type != ACPI_TYPE_BUFFER) {
-               printk(KERN_DEBUG  
-                       "Evaluate _OSC returns wrong type\n");
-               status = AE_TYPE;
-               goto run_osc_out;
+       osc_data = acpi_get_osc_data(handle);
+       if (!osc_data) {
+               printk(KERN_ERR "acpi osc data array is full\n");
+               return AE_ERROR;
        }
-       osc_dw0 = *((u32 *) out_obj->buffer.pointer);
-       if (osc_dw0) {
-               if (osc_dw0 & OSC_REQUEST_ERROR)
-                       printk(KERN_DEBUG "_OSC request fails\n"); 
-               if (osc_dw0 & OSC_INVALID_UUID_ERROR)
-                       printk(KERN_DEBUG "_OSC invalid UUID\n"); 
-               if (osc_dw0 & OSC_INVALID_REVISION_ERROR)
-                       printk(KERN_DEBUG "_OSC invalid revision\n"); 
-               if (osc_dw0 & OSC_CAPABILITIES_MASK_ERROR) {
-                       printk(KERN_DEBUG "_OSC FW not grant req. control\n");
-                       status = AE_SUPPORT;
-                       goto run_osc_out;
-               }
-               status = AE_ERROR;
-               goto run_osc_out;
+
+       osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] |= (flags & OSC_SUPPORT_MASKS);
+
+       /* do _OSC query for all possible controls */
+       temp = osc_data->ctrlset_buf[OSC_CONTROL_TYPE];
+       osc_data->ctrlset_buf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
+       osc_data->ctrlset_buf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
+
+       status = acpi_run_osc(handle, osc_data);
+       *ret_status = status;
+
+       osc_data->ctrlset_buf[OSC_QUERY_TYPE] = !OSC_QUERY_ENABLE;
+       osc_data->ctrlset_buf[OSC_CONTROL_TYPE] = temp;
+       if (ACPI_FAILURE(status)) {
+               /* no osc support at all */
+               osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] = 0;
        }
-       status = AE_OK;
 
-run_osc_out:
-       kfree(output.pointer);
        return status;
 }
 
@@ -260,7 +205,7 @@ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
                return AE_SUPPORT;
        }
        osc_data->ctrlset_buf[OSC_CONTROL_TYPE] |= ctrlset;
-       status = acpi_run_osc(handle, osc_data->ctrlset_buf);
+       status = acpi_run_osc(handle, osc_data);
        if (ACPI_FAILURE (status)) {
                osc_data->ctrlset_buf[OSC_CONTROL_TYPE] &= ~ctrlset;
        }