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| author | Guenter Roeck <linux@roeck-us.net> | 2012-03-28 08:35:26 -0700 |
|---|---|---|
| committer | Guenter Roeck <guenter.roeck@ericsson.com> | 2012-04-09 12:17:36 -0700 |
| commit | 8528e07edfc6ac5a793509f305b9c3c4fb3672c0 (patch) | |
| tree | ea57a83f1c4d2ed4187b50ac341d519da7a2ea2b /drivers/hwmon/smsc47b397.c | |
| parent | 0034102808e0dbbf3a2394b82b1bb40b5778de9e (diff) | |
| download | linux-8528e07edfc6ac5a793509f305b9c3c4fb3672c0.tar.gz linux-8528e07edfc6ac5a793509f305b9c3c4fb3672c0.tar.bz2 linux-8528e07edfc6ac5a793509f305b9c3c4fb3672c0.zip | |
hwmon: (smsc47b397) Fix compiler warning
Some configurations produce the following compiler warning:
drivers/hwmon/smsc47b397.c: In function 'smsc47b397_init':
drivers/hwmon/smsc47b397.c:385: warning: 'address' may be used uninitialized in this function
While this is a false positive, it can easily be fixed by overloading the return
value from smsc47b397_find with both address and error return code (the address
is an unsigned short and thus never negative). This also reduces module size by
a few bytes (64 bytes for x86_64).
Cc: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon/smsc47b397.c')
| -rw-r--r-- | drivers/hwmon/smsc47b397.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/hwmon/smsc47b397.c b/drivers/hwmon/smsc47b397.c index d3b778da3f86..c5f6be478bad 100644 --- a/drivers/hwmon/smsc47b397.c +++ b/drivers/hwmon/smsc47b397.c @@ -343,10 +343,11 @@ exit: return err; } -static int __init smsc47b397_find(unsigned short *addr) +static int __init smsc47b397_find(void) { u8 id, rev; char *name; + unsigned short addr; superio_enter(); id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID); @@ -370,14 +371,14 @@ static int __init smsc47b397_find(unsigned short *addr) rev = superio_inb(SUPERIO_REG_DEVREV); superio_select(SUPERIO_REG_LD8); - *addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8) + addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8) | superio_inb(SUPERIO_REG_BASE_LSB); pr_info("found SMSC %s (base address 0x%04x, revision %u)\n", - name, *addr, rev); + name, addr, rev); superio_exit(); - return 0; + return addr; } static int __init smsc47b397_init(void) @@ -385,9 +386,10 @@ static int __init smsc47b397_init(void) unsigned short address; int ret; - ret = smsc47b397_find(&address); - if (ret) + ret = smsc47b397_find(); + if (ret < 0) return ret; + address = ret; ret = platform_driver_register(&smsc47b397_driver); if (ret) |