neofb: reduce panning function

Reduce panning function by deleting checks done by higher layer and
folding remaining function into the called one.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/video/neofb.c b/drivers/video/neofb.c
index 25172b2..6249960 100644 (file)
--- a/drivers/video/neofb.c
+++ b/drivers/video/neofb.c
@@ -1186,8 +1186,11 @@ static int neofb_set_par(struct fb_info *info)
        return 0;
 }
 
-static void neofb_update_start(struct fb_info *info,
-                              struct fb_var_screeninfo *var)
+/*
+ *    Pan or Wrap the Display
+ */
+static int neofb_pan_display(struct fb_var_screeninfo *var,
+                            struct fb_info *info)
 {
        struct neofb_par *par = info->par;
        struct vgastate *state = &par->state;
@@ -1216,35 +1219,7 @@ static void neofb_update_start(struct fb_info *info,
        vga_wgfx(state->vgabase, 0x0E, (((Base >> 16) & 0x0f) | (oldExtCRTDispAddr & 0xf0)));
 
        neoLock(state);
-}
 
-/*
- *    Pan or Wrap the Display
- */
-static int neofb_pan_display(struct fb_var_screeninfo *var,
-                            struct fb_info *info)
-{
-       u_int y_bottom;
-
-       y_bottom = var->yoffset;
-
-       if (!(var->vmode & FB_VMODE_YWRAP))
-               y_bottom += var->yres;
-
-       if (var->xoffset > (var->xres_virtual - var->xres))
-               return -EINVAL;
-       if (y_bottom > info->var.yres_virtual)
-               return -EINVAL;
-
-       neofb_update_start(info, var);
-
-       info->var.xoffset = var->xoffset;
-       info->var.yoffset = var->yoffset;
-
-       if (var->vmode & FB_VMODE_YWRAP)
-               info->var.vmode |= FB_VMODE_YWRAP;
-       else
-               info->var.vmode &= ~FB_VMODE_YWRAP;
        return 0;
 }