diff options
Diffstat (limited to 'drivers/char/s3c_mem.c')
| -rw-r--r-- | drivers/char/s3c_mem.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/char/s3c_mem.c b/drivers/char/s3c_mem.c index 3e09dda..a8546d0 100644 --- a/drivers/char/s3c_mem.c +++ b/drivers/char/s3c_mem.c @@ -32,6 +32,7 @@ #include <linux/slab.h> #include <linux/mman.h> #include <linux/dma-mapping.h> +#include <linux/cma.h> #include <linux/unistd.h> #include <linux/version.h> @@ -324,6 +325,14 @@ long s3c_mem_ioctl(struct file *file, unsigned int cmd, unsigned long arg) mutex_unlock(&mem_share_alloc_lock); return -EFAULT; } + + if (!cma_is_registered_region(param.phy_addr, param.size)) { + pr_err("%s: %#x@%#x is allowed to map\n", + __func__, param.size, param.phy_addr); + mutex_unlock(&mem_cacheable_share_alloc_lock); + return -EINVAL; + } + flag = MEM_ALLOC_SHARE; physical_address = param.phy_addr; DEBUG("param.phy_addr = %08x, %d\n", @@ -361,6 +370,14 @@ long s3c_mem_ioctl(struct file *file, unsigned int cmd, unsigned long arg) mutex_unlock(&mem_cacheable_share_alloc_lock); return -EFAULT; } + + if (!cma_is_registered_region(param.phy_addr, param.size)) { + pr_err("%s: %#x@%#x is allowed to map\n", + __func__, param.size, param.phy_addr); + mutex_unlock(&mem_cacheable_share_alloc_lock); + return -EINVAL; + } + flag = MEM_ALLOC_CACHEABLE_SHARE; physical_address = param.phy_addr; DEBUG("param.phy_addr = %08x, %d\n", |