1 files changed, 26 insertions, 6 deletions

diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 9f180096c896..10dfdf035264 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -452,13 +452,17 @@ int fb_prepare_logo(struct fb_info *info, int rotate)
 
         /* Return if no suitable logo was found */
         fb_logo.logo = fb_find_logo(depth);
+
+        if (!fb_logo.logo) {
+                return 0;
+        }
         
         if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
                 yres = info->var.yres;
         else
                 yres = info->var.xres;
 
-        if (fb_logo.logo && fb_logo.logo->height > yres) {
+        if (fb_logo.logo->height > yres) {
                 fb_logo.logo = NULL;
                 return 0;
         }
@@ -718,14 +722,30 @@ static void try_to_load(int fb)
 int
 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
 {
+        struct fb_fix_screeninfo *fix = &info->fix;
         int xoffset = var->xoffset;
         int yoffset = var->yoffset;
-        int err;
+        int err = 0, yres = info->var.yres;
+
+        if (var->yoffset > 0) {
+                if (var->vmode & FB_VMODE_YWRAP) {
+                        if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
+                                err = -EINVAL;
+                        else
+                                yres = 0;
+                } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
+                        err = -EINVAL;
+        }
+
+        if (var->xoffset > 0 && (!fix->xpanstep ||
+                                 (var->xoffset % fix->xpanstep)))
+                err = -EINVAL;
+
+        if (err || !info->fbops->fb_pan_display || xoffset < 0 ||
+            yoffset < 0 || var->yoffset + yres > info->var.yres_virtual ||
+            var->xoffset + info->var.xres > info->var.xres_virtual)
+                return -EINVAL;
 
-        if (xoffset < 0 || yoffset < 0 || !info->fbops->fb_pan_display ||
-            xoffset + info->var.xres > info->var.xres_virtual ||
-            yoffset + info->var.yres > info->var.yres_virtual)
-                return -EINVAL;
         if ((err = info->fbops->fb_pan_display(var, info)))
                 return err;
         info->var.xoffset = var->xoffset;