[src/trunk]: src/sys/dev/usb ustir(4): Avoid undefined behaviour if register ...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b554ef548327
branches:  trunk
changeset: 363451:b554ef548327
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Sat Mar 12 21:15:25 2022 +0000

description:
ustir(4): Avoid undefined behaviour if register read fails.

diffstat:

 sys/dev/usb/ustir.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r 4603cd102e19 -r b554ef548327 sys/dev/usb/ustir.c
--- a/sys/dev/usb/ustir.c       Sat Mar 12 20:46:03 2022 +0000
+++ b/sys/dev/usb/ustir.c       Sat Mar 12 21:15:25 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ustir.c,v 1.50 2021/09/26 01:16:09 thorpej Exp $       */
+/*     $NetBSD: ustir.c,v 1.51 2022/03/12 21:15:25 riastradh Exp $     */
 
 /*
  * Copyright (c) 2001 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ustir.c,v 1.50 2021/09/26 01:16:09 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ustir.c,v 1.51 2022/03/12 21:15:25 riastradh Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_usb.h"
@@ -1144,7 +1144,7 @@
        int error;
        unsigned int regnum;
        usbd_status err;
-       uint8_t regdata;
+       uint8_t regdata = 0;
 
        if (sc->sc_dying)
                return EIO;