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SubjectRe: [PATCH] regmap: Fix compile warning with value uninitialized
2013-11-09 16:16 keltezéssel, Mark Brown írta:
> On Sat, Nov 09, 2013 at 09:49:11AM +0000, Caizhiyong wrote:
>
>> @@ -2170,7 +2170,8 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
>> int num_regs)
>> {
>> struct reg_default *p;
>> - int i, ret;
>> + int i;
>> + int ret = 0;
>> bool bypass;
Wouldn't the following be better?

int i, ret = 0;

I think it is more readable.

>
> This sort of fix isn't ideal, it just silences the warning but if the
> compiler has spotted a genuine oversight in the function it won't
> address it. It's better to include some analysis of why this is a good
> fix.
>
The only condition when 'ret' is not set is when the num_regs parameter is zero
and krealloc doesn't fail. If the above two conditions apply, then
the code would return an uninitialized value. However, calling this function with
num_regs == 0, would be a waste as it essentially does nothing.

Also, I think code which throws warnings is worse than code
which doesn't.

--
Regards,
Levente Kurusa
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