i2c: dev: Add __user annotation

Fix Sparse warnings:
drivers/i2c/i2c-dev.c:546:19: warning: incorrect type in assignment (different address spaces)
drivers/i2c/i2c-dev.c:549:53: warning: incorrect type in argument 2 (different address spaces)

compat_ptr() returns a pointer tagged __user which gets assigned to a
pointer missing the __user annotation. The same pointer is passed to
copy_from_user() as an argument where it is expected to have the __user
annotation. Fix both by adding the __user annotation to the pointer.

Fixes: 4e69e2f3444f ("i2c compat ioctls: move to ->compat_ioctl()")
Signed-off-by: Andreas Hecht <andreas.e.hecht@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index 6ef38a8ee95cb22ff7c6d0bc25a09c5c61b39752..cb64fe649390e932257e14db50fe7615c08dd1ea 100644 (file)
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -526,7 +526,7 @@ static long compat_i2cdev_ioctl(struct file *file, unsigned int cmd, unsigned lo
                return put_user(funcs, (compat_ulong_t __user *)arg);
        case I2C_RDWR: {
                struct i2c_rdwr_ioctl_data32 rdwr_arg;
-               struct i2c_msg32 *p;
+               struct i2c_msg32 __user *p;
                struct i2c_msg *rdwr_pa;
                int i;