[PATCH] ioremap balanced with iounmap for drivers/video/atafb

ioremap must be balanced by an iounmap and failing to do so can result in a
memory leak.
Signed-off-by: Amol Lad <amol@verismonetworks.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/video/atafb.c

@@ -2804,8 +2804,19 @@ int __init atafb_init(void)
 	atafb_set_disp(-1, &fb_info);
 	do_install_cmap(0, &fb_info);
 
-	if (register_framebuffer(&fb_info) < 0)
+	if (register_framebuffer(&fb_info) < 0) {
+#ifdef ATAFB_EXT
+		if (external_addr) {
+			iounmap(external_addr);
+			external_addr = NULL;
+		}
+		if (external_vgaiobase) {
+			iounmap((void*)external_vgaiobase);
+			external_vgaiobase = 0;
+		}
+#endif
 		return -EINVAL;
+	}
 
 	printk("Determined %dx%d, depth %d\n",
 	       disp.var.xres, disp.var.yres, disp.var.bits_per_pixel);