[PATCH v3 5/6] mmc: actions: add MMC driver for Actions OWL S700/S900

[Jaehoon Chung]

On 3/1/21 11:25 PM, Andre Przywara wrote:
> On Mon, 1 Mar 2021 18:47:26 +0530
> Amit Tomar <atomar25opensource at gmail.com> wrote:
> 
> Hi,
> 
>>> So this whole mode handling here looks dodgy. Below you mix "assignments
>>> to mode" with "ORing in values", without actually ever initialising mode
>>> explicitly. I wonder why the compiler doesn't warn about this, I can see
>>> paths were you OR into an uninitialised value.
>>>
>>> But the compiler already has initialized mode to 0,
> 
> Why? Where? I just see a local, non-static definition of mode,
> meaning it won't be initialised.

It seems that it doesn't initialize in this function.
I think that resp_type may be always matched one of condition.
I think that's why the compiler doesn't warn. 

Best Regards,
Jaehoon Chung

> 
>> that is why there is no warning.
>> In order to test , printed out mode value which suggests this variable is
>> initialized.
> 
> To what? Just because you printed 0(?) in your test doesn't mean that
> this will always be the case.
> 
> Cheers,
> Andre
>