From: Jiri Slaby <jslaby@suse.cz>
Date: Fri, 18 Jun 2021 06:14:25 +0000 (+0200)
Subject: mxser: make xmit ring buffer variables unsigned
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=02e431444b52728872570a14ade413a2a26be657;p=linux.git

mxser: make xmit ring buffer variables unsigned

Make the xmit ring buffer pointers and counter (xmit_head, xmit_tail,
xmit_cnt) unsigned. Now, the assumptions for the compiler are clear --
they cannot be negative.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-20-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 45f36d92c5ea8..53136a7d92b16 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -351,9 +351,9 @@ struct mxser_port {
 	u8 read_status_mask;
 	u8 ignore_status_mask;
 	u8 xmit_fifo_size;
-	int xmit_head;
-	int xmit_tail;
-	int xmit_cnt;
+	unsigned int xmit_head;
+	unsigned int xmit_tail;
+	unsigned int xmit_cnt;
 	int closing;
 
 	struct ktermios normal_termios;