lxfb: properly alloc cmap in all cases and don't leak the memory
authorMarco La Porta <marco-laporta@tiscali.it>
Wed, 11 Feb 2009 21:04:20 +0000 (13:04 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 11 Feb 2009 22:25:34 +0000 (14:25 -0800)
We weren't properly allocating the cmap for depths greater than 8bpp,
which caused pain for things like DirectFB.  Also, we never freed the cmap
memory upon module unload..

[dilinger@debian.org: dropped unnecessary code and clean up patch]
[dilinger@debian.org: add error checking and handling]
Signed-off-by: Andres Salomon <dilinger@debian.org>
Cc: Jordan Crouse <jordan@cosmicpenguin.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/video/geode/lxfb_core.c

index b965ecd..889cbe3 100644 (file)
@@ -278,13 +278,10 @@ static int lxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 
 static int lxfb_set_par(struct fb_info *info)
 {
-       if (info->var.bits_per_pixel > 8) {
+       if (info->var.bits_per_pixel > 8)
                info->fix.visual = FB_VISUAL_TRUECOLOR;
-               fb_dealloc_cmap(&info->cmap);
-       } else {
+       else
                info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
-               fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0);
-       }
 
        info->fix.line_length = lx_get_pitch(info->var.xres,
                info->var.bits_per_pixel);
@@ -451,6 +448,11 @@ static struct fb_info * __init lxfb_init_fbinfo(struct device *dev)
 
        info->pseudo_palette    = (void *)par + sizeof(struct lxfb_par);
 
+       if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
+               framebuffer_release(info);
+               return NULL;
+       }
+
        info->var.grayscale     = 0;
 
        return info;
@@ -579,8 +581,10 @@ err:
                pci_release_region(pdev, 3);
        }
 
-       if (info)
+       if (info) {
+               fb_dealloc_cmap(&info->cmap);
                framebuffer_release(info);
+       }
 
        return ret;
 }
@@ -604,6 +608,7 @@ static void lxfb_remove(struct pci_dev *pdev)
        iounmap(par->vp_regs);
        pci_release_region(pdev, 3);
 
+       fb_dealloc_cmap(&info->cmap);
        pci_set_drvdata(pdev, NULL);
        framebuffer_release(info);
 }