[PATCH] tgafb: fix copying overlapping areas

The direction of copying in the copyarea functions is selected incorrectly,
resulting in corruption.  This is a fix.
Signed-off-by: NMaciej W. Rozycki <macro@linux-mips.org>
Cc: James Simmons <jsimmons@infradead.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/tgafb.c

@@ -885,7 +885,7 @@ copyarea_line_8bpp(struct fb_info *info, u32 dy, u32 sy,
 
 	n64 = (height * width) / 64;
 
-	if (dy < sy) {
+	if (sy < dy) {
 		spos = (sy + height) * width;
 		dpos = (dy + height) * width;
 
@@ -933,7 +933,7 @@ copyarea_line_32bpp(struct fb_info *info, u32 dy, u32 sy,
 
 	n16 = (height * width) / 16;
 
-	if (dy < sy) {
+	if (sy < dy) {
 		src = tga_fb + (sy + height) * width * 4;
 		dst = tga_fb + (dy + height) * width * 4;