OMAP: DSS2: OMAPFB: Add some locking debug checks

Trigger WARN_ON() messages from various places in the code in case the
memory region is not currently locked.

Signed-off-by: Ville Syrjälä <ville.syrjala@nokia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index a3f72ba79958..a545e8d4817f 100644
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -668,6 +668,8 @@ int check_fb_var(struct fb_info *fbi, struct fb_var_screeninfo *var)
 
         DBG("check_fb_var %d\n", ofbi->id);
 
+        WARN_ON(!atomic_read(&ofbi->region->lock_count));
+
         r = fb_mode_to_dss_mode(var, &mode);
         if (r) {
                 DBG("cannot convert var to omap dss mode\n");
@@ -873,6 +875,8 @@ int omapfb_setup_overlay(struct fb_info *fbi, struct omap_overlay *ovl,
         int rotation = var->rotate;
         int i;
 
+        WARN_ON(!atomic_read(&ofbi->region->lock_count));
+
         for (i = 0; i < ofbi->num_overlays; i++) {
                 if (ovl != ofbi->overlays[i])
                         continue;
@@ -966,6 +970,8 @@ int omapfb_apply_changes(struct fb_info *fbi, int init)
                 fill_fb(fbi);
 #endif
 
+        WARN_ON(!atomic_read(&ofbi->region->lock_count));
+
         for (i = 0; i < ofbi->num_overlays; i++) {
                 ovl = ofbi->overlays[i];