amifb: 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>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/video/amifb.c b/drivers/video/amifb.c
index 100f23661465..82bedd7f7789 100644
--- a/drivers/video/amifb.c
+++ b/drivers/video/amifb.c
@@ -2437,7 +2437,9 @@ default_chipset:
                 goto amifb_error;
         }
 
-        fb_alloc_cmap(&fb_info.cmap, 1<<fb_info.var.bits_per_pixel, 0);
+        err = fb_alloc_cmap(&fb_info.cmap, 1<<fb_info.var.bits_per_pixel, 0);
+        if (err)
+                goto amifb_error;
 
         if (register_framebuffer(&fb_info) < 0) {
                 err = -EINVAL;
@@ -2456,7 +2458,8 @@ amifb_error:
 
 static void amifb_deinit(void)
 {
-        fb_dealloc_cmap(&fb_info.cmap);
+        if (fb_info.cmap.len)
+                fb_dealloc_cmap(&fb_info.cmap);
         chipfree();
         if (videomemory)
                 iounmap((void*)videomemory);