Re: DXE core - Connecting a controller to driver

[TVKR <tresko1@gmail.com>]

Thanks for the reply Andrew. I misread the code and mixed up the for loop
inside the do/while and got confused there for a moment (having one of
those brain fade moments :().

Regards

On Tue, Jun 27, 2017 at 9:07 AM, Andrew Fish <afish@apple.com> wrote:

>
> > On Jun 26, 2017, at 9:30 AM, TVKR <tresko1@gmail.com> wrote:
> >
> > Hi experts,
> >
> > I have  a question related to the ConnectController implementation in the
> > edk2 codebase (MdeModulePkg\Core\Dxe\Hand\DriverSupport.c). Under the
> > CoreConnectSingleController function, what if DriverBinding->Supported
> > returns an error? I see that there is a do/while loop waiting for
> > DriverFound to be set to TRUE, but it looks like this wont happen if
> > DriverBinding->Supported returns an error (looping for ever). Am I
> reading
> > this wrong?
> >
>
> How do you think a do while loop works in C?
>
> DriverFound = FALSE;
> do {
>  ;
> } while (DriverFound);
>
> Is not an infinite loop? It just runs one time.
>
> The code is looping as long as Start() is called as calling Start() could
> cause other drivers Supported() to start returning TRUE, so you have to
> recheck the set after calling Start().
>
> Thanks,
>
> Andrew Fish
>
> > Thanks
> > _______________________________________________
> > edk2-devel mailing list
> > edk2-devel@lists.01.org
> > https://lists.01.org/mailman/listinfo/edk2-devel
>
>