Revert "serial: sh-sci: Clean sci_ports[0] after at earlycon exit"

This reverts commit 3791ea6.

It was reported to cause boot-time issues, so revert it for now.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Fixes: 3791ea6 ("serial: sh-sci: Clean sci_ports[0] after at earlycon exit")
Cc: stable <stable@kernel.org>
Cc: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: gregkh

drivers/tty/serial/sh-sci.c

@@ -3535,32 +3535,6 @@ sh_early_platform_init_buffer("earlyprintk", &sci_driver,
 #ifdef CONFIG_SERIAL_SH_SCI_EARLYCON
 static struct plat_sci_port port_cfg __initdata;
 
-static int early_console_exit(struct console *co)
-{
-	struct sci_port *sci_port = &sci_ports[0];
-	struct uart_port *port = &sci_port->port;
-	unsigned long flags;
-	int locked = 1;
-
-	if (port->sysrq)
-		locked = 0;
-	else if (oops_in_progress)
-		locked = uart_port_trylock_irqsave(port, &flags);
-	else
-		uart_port_lock_irqsave(port, &flags);
-
-	/*
-	 * Clean the slot used by earlycon. A new SCI device might
-	 * map to this slot.
-	 */
-	memset(sci_ports, 0, sizeof(*sci_port));
-
-	if (locked)
-		uart_port_unlock_irqrestore(port, flags);
-
-	return 0;
-}
-
 static int __init early_console_setup(struct earlycon_device *device,
 				      int type)
 {
@@ -3577,8 +3551,6 @@ static int __init early_console_setup(struct earlycon_device *device,
 		       SCSCR_RE | SCSCR_TE | port_cfg.scscr);
 
 	device->con->write = serial_console_write;
-	device->con->exit = early_console_exit;
-
 	return 0;
 }
 static int __init sci_early_console_setup(struct earlycon_device *device,