stifb: check fb_alloc_cmap return value and handle failure properly

Signed-off-by: Andres Salomon <dilinger@debian.org>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/stifb.c

@@ -1262,24 +1262,25 @@ static int __init stifb_init_fb(struct sti_struct *sti, int bpp_pref)
 	info->flags = FBINFO_DEFAULT;
 	info->pseudo_palette = &fb->pseudo_palette;
 
-	/* This has to been done !!! */
-	fb_alloc_cmap(&info->cmap, NR_PALETTE, 0);
+	/* This has to be done !!! */
+	if (fb_alloc_cmap(&info->cmap, NR_PALETTE, 0))
+		goto out_err1;
 	stifb_init_display(fb);
 
 	if (!request_mem_region(fix->smem_start, fix->smem_len, "stifb fb")) {
 		printk(KERN_ERR "stifb: cannot reserve fb region 0x%04lx-0x%04lx\n",
 				fix->smem_start, fix->smem_start+fix->smem_len);
-		goto out_err1;
+		goto out_err2;
 	}
 
 	if (!request_mem_region(fix->mmio_start, fix->mmio_len, "stifb mmio")) {
 		printk(KERN_ERR "stifb: cannot reserve sti mmio region 0x%04lx-0x%04lx\n",
 				fix->mmio_start, fix->mmio_start+fix->mmio_len);
-		goto out_err2;
+		goto out_err3;
 	}
 
 	if (register_framebuffer(&fb->info) < 0)
-		goto out_err3;
+		goto out_err4;
 
 	sti->info = info; /* save for unregister_framebuffer() */
 
@@ -1297,13 +1298,14 @@ static int __init stifb_init_fb(struct sti_struct *sti, int bpp_pref)
 	return 0;
 
 
-out_err3:
+out_err4:
 	release_mem_region(fix->mmio_start, fix->mmio_len);
-out_err2:
+out_err3:
 	release_mem_region(fix->smem_start, fix->smem_len);
+out_err2:
+	fb_dealloc_cmap(&info->cmap);
 out_err1:
 	iounmap(info->screen_base);
-	fb_dealloc_cmap(&info->cmap);
 out_err0:
 	kfree(fb);
 	return -ENXIO;