Messages in this thread Patch in this message | | | From | Giel van Schijndel <> | Subject | [PATCH] hwmon: f71882fg: acquire I/O regions while we're working with them | Date | Wed, 24 Mar 2010 10:09:31 +0100 |
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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> --- drivers/hwmon/f71882fg.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/drivers/hwmon/f71882fg.c b/drivers/hwmon/f71882fg.c index ca34e5c..fe7b671 100644 --- a/drivers/hwmon/f71882fg.c +++ b/drivers/hwmon/f71882fg.c @@ -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 -EIO; + } + 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; } -- 1.6.4.4
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