From: Johan Hovold <johan@kernel.org>
Date: Mon, 3 Apr 2017 09:58:55 +0000 (+0200)
Subject: USB: serial: quatech2: drop redundant tty_buffer_request_room
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=185fcb3fbe6d32d894b8b72429622d91c59b10f6;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

USB: serial: quatech2: drop redundant tty_buffer_request_room

Drop redundant calls to tty_buffer_request_room and use the more
efficient tty_insert_flip_char when inserting single characters.

Signed-off-by: Johan Hovold <johan@kernel.org>
---

diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c
index 6ddcaa2de902..60e17d1444c3 100644
--- a/drivers/usb/serial/quatech2.c
+++ b/drivers/usb/serial/quatech2.c
@@ -601,7 +601,6 @@ static void qt2_process_read_urb(struct urb *urb)
 				escapeflag = true;
 				break;
 			case QT2_CONTROL_ESCAPE:
-				tty_buffer_request_room(&port->port, 2);
 				tty_insert_flip_string(&port->port, ch, 2);
 				i += 2;
 				escapeflag = true;
@@ -616,8 +615,7 @@ static void qt2_process_read_urb(struct urb *urb)
 				continue;
 		}
 
-		tty_buffer_request_room(&port->port, 1);
-		tty_insert_flip_string(&port->port, ch, 1);
+		tty_insert_flip_char(&port->port, *ch, TTY_NORMAL);
 	}
 
 	tty_flip_buffer_push(&port->port);