V4L/DVB (8898): pvrusb2: Be able to programmatically retrieve a control's default value

The pvrusb2 control mechanism up until now has used a constant int to
hold a control's default value.  This change makes it possible to
retrieve the control's default through some other means, e.g. as a
result of a query from lower level software.

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-ctrl.c b/drivers/media/video/pvrusb2/pvrusb2-ctrl.c
index 0764fbfffb73..2741c7b0b537 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-ctrl.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-ctrl.c
@@ -134,13 +134,19 @@ int pvr2_ctrl_get_min(struct pvr2_ctrl *cptr)
 
 
 /* Retrieve control's default value (any type) */
-int pvr2_ctrl_get_def(struct pvr2_ctrl *cptr)
+int pvr2_ctrl_get_def(struct pvr2_ctrl *cptr, int *valptr)
 {
         int ret = 0;
         if (!cptr) return 0;
         LOCK_TAKE(cptr->hdw->big_lock); do {
                 if (cptr->info->type == pvr2_ctl_int) {
-                        ret = cptr->info->default_value;
+                        if (cptr->info->get_def_value) {
+                                /* Comment to keep checkpatch.pl quiet */
+                                ret = cptr->info->get_def_value(cptr, valptr);
+                        } else {
+                                /* Comment to keep checkpatch.pl quiet */
+                                *valptr = cptr->info->default_value;
+                        }
                 }
         } while(0); LOCK_GIVE(cptr->hdw->big_lock);
         return ret;