tee: optee: do not check memref size on return from Secure World

Bugzilla: https://bugzilla.redhat.com/2166659

commit abc8dc3
Author: Jerome Forissier <jerome@forissier.org>
Date:   Thu Jan 13 16:27:13 2022 +0100

    tee: optee: do not check memref size on return from Secure World

    Commit c650b8d ("tee: optee: do not check memref size on return
    from Secure World") was mistakenly lost in commit 4602c58 ("optee:
    refactor driver with internal callbacks"). Remove the unwanted code
    again.

    Fixes: 4602c58 ("optee: refactor driver with internal callbacks")
    Signed-off-by: Jerome Forissier <jerome@forissier.org>
    Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
    Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

Signed-off-by: Chris von Recklinghausen <crecklin@redhat.com>

Author: Chris von Recklinghausen

drivers/tee/optee/smc_abi.c

@@ -70,16 +70,6 @@ static int from_msg_param_tmp_mem(struct tee_param *p, u32 attr,
 	p->u.memref.shm_offs = mp->u.tmem.buf_ptr - pa;
 	p->u.memref.shm = shm;
 
-	/* Check that the memref is covered by the shm object */
-	if (p->u.memref.size) {
-		size_t o = p->u.memref.shm_offs +
-			   p->u.memref.size - 1;
-
-		rc = tee_shm_get_pa(shm, o, NULL);
-		if (rc)
-			return rc;
-	}
-
 	return 0;
 }