diff options
Diffstat (limited to 'drivers/hwmon/vt1211.c')
| -rw-r--r-- | drivers/hwmon/vt1211.c | 30 |
1 files changed, 13 insertions, 17 deletions
diff --git a/drivers/hwmon/vt1211.c b/drivers/hwmon/vt1211.c index 3a6bfa51cb94..2fbdc532aed4 100644 --- a/drivers/hwmon/vt1211.c +++ b/drivers/hwmon/vt1211.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * vt1211.c - driver for the VIA VT1211 Super-I/O chip integrated hardware * monitoring features @@ -5,20 +6,6 @@ * * This driver is based on the driver for kernel 2.4 by Mark D. Studebaker * and its port to kernel 2.6 by Lars Ekman. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -226,15 +213,21 @@ static inline void superio_select(int sio_cip, int ldn) outb(ldn, sio_cip + 1); } -static inline void superio_enter(int sio_cip) +static inline int superio_enter(int sio_cip) { + if (!request_muxed_region(sio_cip, 2, DRVNAME)) + return -EBUSY; + outb(0x87, sio_cip); outb(0x87, sio_cip); + + return 0; } static inline void superio_exit(int sio_cip) { outb(0xaa, sio_cip); + release_region(sio_cip, 2); } /* --------------------------------------------------------------------- @@ -1282,11 +1275,14 @@ EXIT: static int __init vt1211_find(int sio_cip, unsigned short *address) { - int err = -ENODEV; + int err; int devid; - superio_enter(sio_cip); + err = superio_enter(sio_cip); + if (err) + return err; + err = -ENODEV; devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID); if (devid != SIO_VT1211_ID) goto EXIT; |