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>

diff --git a/drivers/video/amifb.c b/drivers/video/amifb.c
index 100f236614650f42337d7007adb5f32cf09ebf77..82bedd7f778967ee879258d27bc9183111107036 100644 (file)
--- 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);