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

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

drivers/video/amifb.c

@@ -2407,10 +2407,10 @@ int __init amifb_init(void)
 						   fb_info.fix.smem_len);
 	if (!videomemory) {
 		printk("amifb: WARNING! unable to map videomem cached writethrough\n");
-		videomemory = ZTWO_VADDR(fb_info.fix.smem_start);
-	}
-
+		fb_info.screen_base = (char *)ZTWO_VADDR(fb_info.fix.smem_start);
+	} else
 		fb_info.screen_base = (char *)videomemory;
+
 	memset(dummysprite, 0, DUMMYSPRITEMEMSIZE);
 
 	/*
@@ -2453,6 +2453,8 @@ static void amifb_deinit(void)
 {
 	fb_dealloc_cmap(&fb_info.cmap);
 	chipfree();
+	if (videomemory)
+		iounmap((void*)videomemory);
 	release_mem_region(CUSTOM_PHYSADDR+0xe0, 0x120);
 	custom.dmacon = DMAF_ALL | DMAF_MASTER;
 }