fbcon: clear the logo bitmap from the margin area

Explicitly clear_margins when clearing the logo, in case the font dimensions
are non-integral to the framebuffer dimensions.

Signed-off-by: Kamal Mostafa <kamal@whence.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index fdefa8fd72c4..f8a61e210d2e 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -1242,8 +1242,16 @@ static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
         if (!height || !width)
                 return;
 
-        if (sy < vc->vc_top && vc->vc_top == logo_lines)
+        if (sy < vc->vc_top && vc->vc_top == logo_lines) {
                 vc->vc_top = 0;
+                /*
+                 * If the font dimensions are not an integral of the display
+                 * dimensions then the ops->clear below won't end up clearing
+                 * the margins.  Call clear_margins here in case the logo
+                 * bitmap stretched into the margin area.
+                 */
+                fbcon_clear_margins(vc, 0);
+        }
 
         /* Split blits that cross physical y_wrap boundary */