diff options
Diffstat (limited to 'drivers/char/exynos_mem.c')
| -rw-r--r-- | drivers/char/exynos_mem.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/char/exynos_mem.c b/drivers/char/exynos_mem.c index 85c7a29..cf546a1 100644 --- a/drivers/char/exynos_mem.c +++ b/drivers/char/exynos_mem.c @@ -18,6 +18,7 @@ #include <linux/uaccess.h> #include <linux/highmem.h> #include <linux/dma-mapping.h> +#include <linux/cma.h> #include <asm/cacheflush.h> #include <plat/cpu.h> @@ -83,6 +84,12 @@ static void cache_maint_phys(phys_addr_t start, size_t length, enum cacheop op) size_t left = length; phys_addr_t begin = start; + if (!cma_is_registered_region(start, length)) { + pr_err("[%s] handling non-cma region (%#x@%#x) is prohibited\n", + __func__, length, start); + return; + } + if (!soc_is_exynos5250() && !soc_is_exynos5210()) { if (length > (size_t) L1_FLUSH_ALL) { flush_cache_all(); @@ -257,10 +264,9 @@ int exynos_mem_mmap(struct file *filp, struct vm_area_struct *vma) pfn = mem->phybase; } - /* TODO: currently lowmem is only avaiable */ - if ((phys_to_virt(start) < (void *)PAGE_OFFSET) || - (phys_to_virt(start) >= high_memory)) { - pr_err("[%s] invalid paddr(0x%08x)\n", __func__, start); + if (!cma_is_registered_region(start, size)) { + pr_err("[%s] handling non-cma region (%#x@%#x) is prohibited\n", + __func__, size, start); return -EINVAL; } |