[U-Boot] [PATCH v3 3/7] dfu: Remove dependency on HUSH parser in SPL

[Lukasz Majewski]

Hi Tom,

> On Tue, Jan 22, 2019 at 11:43:33PM +0100, Lukasz Majewski wrote:
> > On Thu, 17 Jan 2019 13:43:04 -0600
> > "Andrew F. Davis" <afd at ti.com> wrote:
> >   
> > > CLI support with the HUSH parser is not currently SPL safe due to
> > > it's use of realloc. That function is not defined for SPLs that
> > > use SYS_MALLOC_SIMPLE. CLI support can be built in to SPL and some
> > > functions do work, but use of some like run_command() will cause
> > > build to fail. When no SPL code calls this function build works as
> > > the compiler removes this unreachable code so the unresolved
> > > symbols are ignored.
> > > 
> > > If DFU support is enabled in SPL then MMU DFU support may get
> > > brought in also, this code does make a call to run_command()
> > > causing build to fail if the HUSH parser is not built-in. To
> > > break this odd and unneeded dependency chain we use
> > > CONFIG_IS_ENABLED where appropriate to prevent calls into HUSH
> > > code from SPL. This also removes our need to pull in the rather
> > > unrelated source file when SPL_DFU is defined. 
> > 
> > If I remember correctly the HUSH was _required_ by TI to be able to
> > use DFU in SPL (and that was a rationale to add it to SPL - which
> > IMHO was wrong from the outset).
> > 
> > What has changed that it is not needed anymore?  
> 
> To be fair, it was probably me-at-TI rather than TI that said it was
> required.  At the time it was enough of a PITA to try and handle all
> of the cases that the dfu cli command handled via API calls instead
> that at least in my opinion, it wasn't worth re-whacking everything
> else. Times have changed it seems :)
> 

I don't mind :-).

Less code in SPL - the better.


Best regards,

Lukasz Majewski

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