int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *info)
{
int rc, size = cmap->len * sizeof(u16);
struct fb_cmap umap;
if (size < 0 || size < cmap->len)
return -E2BIG;
memset(&umap, 0, sizeof(struct fb_cmap));
rc = fb_alloc_cmap_gfp(&umap, cmap->len, cmap->transp != NULL,
GFP_KERNEL);
if (rc)
return rc;
if (copy_from_user(umap.red, cmap->red, size) ||
copy_from_user(umap.green, cmap->green, size) ||
copy_from_user(umap.blue, cmap->blue, size) ||
(cmap->transp && copy_from_user(umap.transp, cmap->transp, size))) {
rc = -EFAULT;
goto out;
}
umap.start = cmap->start;
if (!lock_fb_info(info)) {
rc = -ENODEV;
goto out;
}
rc = fb_set_cmap(&umap, info);
unlock_fb_info(info);
out:
fb_dealloc_cmap(&umap);
return rc;
}
int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp)
{
return fb_alloc_cmap_gfp(cmap, len, transp, GFP_ATOMIC);
}
