Messages in this thread Patch in this message | | | Subject | Re: [PATCH-2.5] Fix w83781d sensor to use Milli-Volt for in_* in sysfs | From | Martin Schlemmer <> | Date | 09 Apr 2003 08:18:21 +0200 |
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On Wed, 2003-04-09 at 00:04, Greg KH wrote:
> Oh, I'm getting the following warning when building the driver, want to > look into this? > > drivers/i2c/chips/w83781d.c: In function `store_fan_div_reg': > drivers/i2c/chips/w83781d.c:715: warning: `old3' might be used uninitialized in this function >
It is because old3 is only referenced if:
((data->type != w83781d) && data->type != as99127f)
as those two chips don't have extended divisor bits ...
It is however set in the first occurrence:
--------------------------------------------------------------------- /* w83781d and as99127f don't have extended divisor bits */ if ((data->type != w83781d) && data->type != as99127f) { old3 = w83781d_read_value(client, W83781D_REG_VBAT); } ---------------------------------------------------------------------
and thus is rather gcc being brain dead for not being able to figure old3 is only used within a if block like that.
I was not sure about style policy in a case like this, so I left it as is, it should however be possible to 'fix' it with:
--- 1/drivers/i2c/chips/w83781d.c 2003-04-09 08:16:08.000000000 +0200 +++ 2/drivers/i2c/chips/w83781d.c 2003-04-09 08:16:22.000000000 +0200 @@ -712,7 +712,7 @@ { struct i2c_client *client = to_i2c_client(dev); struct w83781d_data *data = i2c_get_clientdata(client); - u32 val, old, old2, old3; + u32 val, old, old2, old3 = 0; val = simple_strtoul(buf, NULL, 10); old = w83781d_read_value(client, W83781D_REG_VID_FANDIV);
Regards,
-- Martin Schlemmer
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