diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 09a183dfc52640..a31db15cd7c0d3 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -1520,11 +1520,13 @@ static int __init sc16is7xx_init(void)
 #endif
 	return ret;
 
+#ifdef CONFIG_SERIAL_SC16IS7XX_SPI
 err_spi:
+#endif
 #ifdef CONFIG_SERIAL_SC16IS7XX_I2C
 	i2c_del_driver(&sc16is7xx_i2c_uart_driver);
-#endif
 err_i2c:
+#endif
 	uart_unregister_driver(&sc16is7xx_uart);
 	return ret;
 }
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 2d1c626312cd88..3cd139752d3f70 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -2512,14 +2512,16 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 			 * center of the last stop bit in sampling clocks.
 			 */
 			int last_stop = bits * 2 - 1;
-			int deviation = min_err * srr * last_stop / 2 / baud;
+			int deviation = DIV_ROUND_CLOSEST(min_err * last_stop *
+							  (int)(srr + 1),
+							  2 * (int)baud);
 
 			if (abs(deviation) >= 2) {
 				/* At least two sampling clocks off at the
 				 * last stop bit; we can increase the error
 				 * margin by shifting the sampling point.
 				 */
-				int shift = min(-8, max(7, deviation / 2));
+				int shift = clamp(deviation / 2, -8, 7);
 
 				hssrr |= (shift << HSCIF_SRHP_SHIFT) &
 					 HSCIF_SRHP_MASK;
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index d34984aa646dc4..650c66886c80f5 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -1520,7 +1520,8 @@ static void csi_J(struct vc_data *vc, int vpar)
 			return;
 	}
 	scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
-	update_region(vc, (unsigned long) start, count);
+	if (con_should_update(vc))
+		do_update_region(vc, (unsigned long) start, count);
 	vc->vc_need_wrap = 0;
 }