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hwmon: (f71882fg) Acquire I/O regions while we're working with them

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Acquire the I/O region for the Super I/O chip while we're working on it.

Signed-off-by: Giel van Schijndel <me@mortis.eu>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Giel van Schijndel 2010-05-27 19:58:43 +02:00 committed by Jean Delvare
parent bd328acdc6
commit 729d273aa7
1 changed files with 8 additions and 0 deletions
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8
drivers/hwmon/f71882fg.c
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@ -2178,6 +2178,13 @@ static int __init f71882fg_find(int sioaddr, unsigned short *address,
int err = -ENODEV;
u16 devid;
/* Don't step on other drivers' I/O space by accident */
if (!request_region(sioaddr, 2, DRVNAME)) {
printk(KERN_ERR DRVNAME ": I/O address 0x%04x already in use\n",
(int)sioaddr);
return -EBUSY;
}
superio_enter(sioaddr);
devid = superio_inw(sioaddr, SIO_REG_MANID);
@ -2232,6 +2239,7 @@ static int __init f71882fg_find(int sioaddr, unsigned short *address,
(int)superio_inb(sioaddr, SIO_REG_DEVREV));
exit:
superio_exit(sioaddr);
release_region(sioaddr, 2);
return err;
}