[PATCH] fbdev: Fix logo rotation if width != height

[PATCH] fbdev: Fix logo rotation if width != height

[Antonino A. Daplas]

Logo drawing crashes or produces a corrupt display if the logo width and
height are not equal.  The dimensions are transposed prior to the actual
rotation and the width is used instead of the height in the actual rotation
code. These produce a corrupt image.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
---

 drivers/video/fbmem.c |   20 ++++++++++----------
 1 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 9527a52..31143af 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -334,11 +334,11 @@ static void fb_rotate_logo_ud(const u8 *
 
 static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
 {
-	int i, j, w = width - 1;
+	int i, j, h = height - 1;
 
 	for (i = 0; i < height; i++)
 		for (j = 0; j < width; j++)
-			out[height * j + w - i] = *in++;
+				out[height * j + h - i] = *in++;
 }
 
 static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
@@ -356,24 +356,24 @@ static void fb_rotate_logo(struct fb_inf
 	u32 tmp;
 
 	if (rotate == FB_ROTATE_UD) {
-		image->dx = info->var.xres - image->width;
-		image->dy = info->var.yres - image->height;
 		fb_rotate_logo_ud(image->data, dst, image->width,
 				  image->height);
+		image->dx = info->var.xres - image->width;
+		image->dy = info->var.yres - image->height;
 	} else if (rotate == FB_ROTATE_CW) {
-		tmp = image->width;
-		image->width = image->height;
-		image->height = tmp;
-		image->dx = info->var.xres - image->height;
 		fb_rotate_logo_cw(image->data, dst, image->width,
 				  image->height);
-	} else if (rotate == FB_ROTATE_CCW) {
 		tmp = image->width;
 		image->width = image->height;
 		image->height = tmp;
-		image->dy = info->var.yres - image->width;
+		image->dx = info->var.xres - image->width;
+	} else if (rotate == FB_ROTATE_CCW) {
 		fb_rotate_logo_ccw(image->data, dst, image->width,
 				   image->height);
+		tmp = image->width;
+		image->width = image->height;
+		image->height = tmp;
+		image->dy = info->var.yres - image->height;
 	}
 
 	image->data = dst;