Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/tty/tty_jobctrl.c b/drivers/tty/tty_jobctrl.c
index c4ecd66..f8ed50a 100644
--- a/drivers/tty/tty_jobctrl.c
+++ b/drivers/tty/tty_jobctrl.c
@@ -44,7 +44,7 @@
 	tty_pgrp = tty->pgrp;
 	spin_unlock_irqrestore(&tty->ctrl_lock, flags);
 
-	if (tty_pgrp && pgrp != tty->pgrp) {
+	if (tty_pgrp && pgrp != tty_pgrp) {
 		if (is_ignored(sig)) {
 			if (sig == SIGTTIN)
 				ret = -EIO;
@@ -313,7 +313,7 @@
 	read_unlock(&tasklist_lock);
 }
 
-/**
+/*
  *
  *	no_tty	- Ensure the current process does not have a controlling tty
  */