diff options
Diffstat (limited to 'drivers/video/fbmem.c')
| -rw-r--r-- | drivers/video/fbmem.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index b585a38..1ca9b20 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -34,6 +34,7 @@ #include <linux/fb.h> #include <asm/fb.h> +#include <linux/cma.h> /* @@ -1380,6 +1381,17 @@ fb_mmap(struct file *file, struct vm_area_struct * vma) /* frame buffer memory */ start = info->fix.smem_start; len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); + +#if defined(CONFIG_CPU_EXYNOS4212) || defined(CONFIG_CPU_EXYNOS4412) + if (!cma_is_registered_region(start, len)) { + pr_err("%s: %x@%x is allowed to map\n", + __func__, (unsigned int)start, + (unsigned int)len); + mutex_unlock(&info->mm_lock); + return -EINVAL; + } +#endif + if (off >= len) { /* memory mapped io */ off -= len; |