mtd: Fix pointer handling in compat ioctls to use compat_ptr()

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 5fff04f3303d..5b081cb84351 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -839,7 +839,7 @@ static long mtd_compat_ioctl(struct file *file, unsigned int cmd,
         struct inode *inode = file->f_path.dentry->d_inode;
         struct mtd_file_info *mfi = file->private_data;
         struct mtd_info *mtd = mfi->mtd;
-        void __user *argp = (void __user *)arg;
+        void __user *argp = compat_ptr(arg);
         int ret = 0;
 
         lock_kernel();
@@ -874,7 +874,7 @@ static long mtd_compat_ioctl(struct file *file, unsigned int cmd,
                 break;
         }
         default:
-                ret = mtd_ioctl(inode, file, cmd, arg);
+                ret = mtd_ioctl(inode, file, cmd, (unsigned long)argp);
         }
 
         unlock_kernel();