drm/amd: consolidate TA shared memory structures

[linux-2.6-microblaze.git] / drivers / hwmon / smsc47b397.c

diff --git a/drivers/hwmon/smsc47b397.c b/drivers/hwmon/smsc47b397.c
index c077508..f928b8d 100644 (file)
--- a/drivers/hwmon/smsc47b397.c
+++ b/drivers/hwmon/smsc47b397.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * smsc47b397.c - Part of lm_sensors, Linux kernel modules
  * for hardware monitoring
@@ -10,20 +11,6 @@
  * derived in part from smsc47m1.c:
  * Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
  * Copyright (C) 2004 Jean Delvare <jdelvare@suse.de>
- *
- * 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
@@ -72,14 +59,19 @@ static inline void superio_select(int ld)
        superio_outb(0x07, ld);
 }
 
-static inline void superio_enter(void)
+static inline int superio_enter(void)
 {
+       if (!request_muxed_region(REG, 2, DRVNAME))
+               return -EBUSY;
+
        outb(0x55, REG);
+       return 0;
 }
 
 static inline void superio_exit(void)
 {
        outb(0xAA, REG);
+       release_region(REG, 2);
 }
 
 #define SUPERIO_REG_DEVID      0x20
@@ -300,8 +292,12 @@ static int __init smsc47b397_find(void)
        u8 id, rev;
        char *name;
        unsigned short addr;
+       int err;
+
+       err = superio_enter();
+       if (err)
+               return err;
 
-       superio_enter();
        id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
 
        switch (id) {