crypto: qat - fix mutex ordering in adf_rl

If the function validate_user_input() returns an error, the error path
attempts to unlock an unacquired mutex.
Acquire the mutex before calling validate_user_input(). This is not
strictly necessary but simplifies the code.

Fixes: d9fb8408 ("crypto: qat - add rate limiting feature to qat_4xxx")
Signed-off-by: Damian Muszynski <damian.muszynski@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/intel/qat/qat_common/adf_rl.c

@@ -815,13 +815,13 @@ static int add_update_sla(struct adf_accel_dev *accel_dev,
 		return -EFAULT;
 	}
 
+	mutex_lock(&rl_data->rl_lock);
+
 	/* Input validation */
 	ret = validate_user_input(accel_dev, sla_in, is_update);
 	if (ret)
 		goto ret_err;
 
-	mutex_lock(&rl_data->rl_lock);
-
 	if (is_update) {
 		ret = validate_sla_id(accel_dev, sla_in->sla_id);
 		if (ret)