amba-clcd: fix cmap memory leaks

- fix cmap leak in removal path

- fix cmap leak when register_framebuffer fails

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>

diff --git a/drivers/video/amba-clcd.c b/drivers/video/amba-clcd.c
index 4e046fe..61050ab 100644 (file)
--- a/drivers/video/amba-clcd.c
+++ b/drivers/video/amba-clcd.c
@@ -408,7 +408,9 @@ static int clcdfb_register(struct clcd_fb *fb)
        /*
         * Allocate colourmap.
         */
-       fb_alloc_cmap(&fb->fb.cmap, 256, 0);
+       ret = fb_alloc_cmap(&fb->fb.cmap, 256, 0);
+       if (ret)
+               goto unmap;
 
        /*
         * Ensure interrupts are disabled.
@@ -426,6 +428,8 @@ static int clcdfb_register(struct clcd_fb *fb)
 
        printk(KERN_ERR "CLCD: cannot register framebuffer (%d)\n", ret);
 
+       fb_dealloc_cmap(&fb->fb.cmap);
+ unmap:
        iounmap(fb->regs);
  free_clk:
        clk_put(fb->clk);
@@ -485,6 +489,8 @@ static int clcdfb_remove(struct amba_device *dev)
 
        clcdfb_disable(fb);
        unregister_framebuffer(&fb->fb);
+       if (fb->fb.cmap.len)
+               fb_dealloc_cmap(&fb->fb.cmap);
        iounmap(fb->regs);
        clk_put(fb->clk);