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, 2 insertions, 0 deletions

diff --git a/drivers/video/omap2/omapfb/omapfb-ioctl.c b/drivers/video/omap2/omapfb/omapfb-ioctl.c
index 7975a99c33f..d1f56d37405 100644
--- a/drivers/video/omap2/omapfb/omapfb-ioctl.c
+++ b/drivers/video/omap2/omapfb/omapfb-ioctl.c
@@ -222,6 +222,7 @@ static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
         rg = ofbi->region;
 
         down_write_nested(&rg->lock, rg->id);
+        atomic_inc(&rg->lock_count);
 
         if (atomic_read(&rg->map_count)) {
                 r = -EBUSY;
@@ -252,6 +253,7 @@ static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
         }
 
  out:
+        atomic_dec(&rg->lock_count);
         up_write(&rg->lock);
 
         return r;