fbdev: stifb: Make the STI next font pointer a 32-bit signed offset

[ Upstream commit 8a32aa17c1cd48df1ddaa78e45abcb8c7a2220d6 ]

The pointer to the next STI font is actually a signed 32-bit
offset. With this change the 64-bit kernel will correctly subract
the (signed 32-bit) offset instead of adding a (unsigned 32-bit)
offset. It has no effect on 32-bit kernels.

This fixes the stifb driver with a 64-bit kernel on qemu.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/video/fbdev/sticore.h b/drivers/video/fbdev/sticore.h
index 0ebdd28..d83ab3d 100644 (file)
--- a/drivers/video/fbdev/sticore.h
+++ b/drivers/video/fbdev/sticore.h
@@ -231,7 +231,7 @@ struct sti_rom_font {
         u8 height;
         u8 font_type;          /* language type */
         u8 bytes_per_char;
-       u32 next_font;
+       s32 next_font;          /* note: signed int */
         u8 underline_height;
         u8 underline_pos;
         u8 res008[2];