Re: [PATCH] uio.c: Fix warning: 'ret' might be used uninitialized

[Hans J. Koch]

On Thu, Nov 29, 2012 at 06:36:59PM +0200, Vitalii Demianets wrote:
> > On Thursday 29 November 2012 18:05:27 Tux9 wrote:
> > > Hans, I think there are something wrong in your patch, while Vitalii's
> > > is right. The variable "ret" is reused in line 292 and line 295, so
> > > the value of "ret" would be overridden (if it goto err_map in line 284
> > > when mi>=1).
> >
> > Actually, both patches do exactly the same thing. Hans's patch establishes
> > default value for the ret for all those "other" cases when ret is not
> > explicitly overridden. My patch explicitly enumerates all those "other"
> > cases in more wordily manner.
> >
> 
> Oops, disregard this. After looking at it more thoroughly I got your point.
> You are right, ret is overridden at first iteration (mi == 0), so Hans's 
> approach does not work.
> I must do more thinking before replying in a hurry.

You're right. Initialization of "ret" has to take place at the beginning of
the loop.

I think this version is right: