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@xxxxxxxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
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 d3b778d..c5f6be4 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)
--
1.7.5.4
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