diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index b2b01d5..bc613b8 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -2014,11 +2014,11 @@
 	n = min(head - ldata->read_tail, N_TTY_BUF_SIZE - tail);
 	n = min(*nr, n);
 	if (n) {
-		retval = copy_to_user(*b, read_buf_addr(ldata, tail), n);
+		const unsigned char *from = read_buf_addr(ldata, tail);
+		retval = copy_to_user(*b, from, n);
 		n -= retval;
-		is_eof = n == 1 && read_buf(ldata, tail) == EOF_CHAR(tty);
-		tty_audit_add_data(tty, read_buf_addr(ldata, tail), n,
-				ldata->icanon);
+		is_eof = n == 1 && *from == EOF_CHAR(tty);
+		tty_audit_add_data(tty, from, n, ldata->icanon);
 		smp_store_release(&ldata->read_tail, ldata->read_tail + n);
 		/* Turn single EOF into zero-length read */
 		if (L_EXTPROC(tty) && ldata->icanon && is_eof &&