[U-Boot] [PATCH 7/7] crash when scroll screen

[eric.gao at rock-chips.com]

From: "eric.gao" <eric.gao at rock-chips.com>

After enable log printing to lcd,when the screen start scroll,the
system crash.And the log is shown as bellow.

"Synchronous Abort" handler, esr 0x96000045
"Synchronous Abort" handler, esr 0x96000045

Checking the source code, we found that the variate "pixels"
get a wrong value.

int pixels = VIDEO_FONT_HEIGHT * vid_priv->line_length;

"pixels" here means the value of pixels for a character,rather than
the byte for a character. so the variate "pixels" is 4 times bigger
than it's exact value. which will cause the memory overflow when the
cpu run the following code.

for (i = 0; i < pixels; i++)
    *dst++ = clr; <<----

Signed-off-by: eric.gao <eric.gao at rock-chips.com>
---

 drivers/video/console_normal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/console_normal.c b/drivers/video/console_normal.c
index 89a55dd..b627d48 100644
--- a/drivers/video/console_normal.c
+++ b/drivers/video/console_normal.c
@@ -18,7 +18,7 @@ static int console_normal_set_row(struct udevice *dev, uint row, int clr)
 {
 	struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
 	void *line;
-	int pixels = VIDEO_FONT_HEIGHT * vid_priv->line_length;
+	int pixels = VIDEO_FONT_HEIGHT * vid_priv->xsize;
 	int i;
 
 	line = vid_priv->fb + row * VIDEO_FONT_HEIGHT * vid_priv->line_length;
-- 
1.9.1