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

This commit is contained in:
riastradh 2022-03-12 21:15:25 +00:00
parent 818306e487
commit b081b9317d
1 changed files with 3 additions and 3 deletions
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6
sys/dev/usb/ustir.c
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@ -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 @@ Static int ustir_ioctl(void *h, u_long cmd, void *addr, int flag, struct lwp *l)
int error;
unsigned int regnum;
usbd_status err;
uint8_t regdata;
uint8_t regdata = 0;
if (sc->sc_dying)
return EIO;