[U-Boot] Commit ecee9... (Program net device MAC addresses after initializing) breakage

[Mike Frysinger <vapier@gentoo.org>]

On Saturday, November 06, 2010 18:13:08 Graeme Russ wrote:
> I finally got a few spare hours to do some U-Boot hacking and to my dismay
> found the build for my board (eNET) had broken. It builds OK, but crashed
> during Ethernet initialisation. I tried winding back to a last known good
> commit without much luck.
> 
> I realised I had upgraded to Ubuntu 10.10 lately, and thought maybe a
> tool-chain change was the culprit (was running gcc-4.4.1 and binutils 2.19
> from source, now running Ubuntu gcc 4.4.5 and Binutils 2.20)
> 
> But, I think that commit ecee9324d73555e744593f3e0d387bec4c566f55 may be
> 'not quite right'. My board uses the rtl8139 driver, and the following
> patch gets my board booting again:
>
> Just before this code we see that dev is malloc'd:
> 
> dev = (struct eth_device *)malloc(sizeof *dev);
> 
> So there is no guarantee that dev is NULL'd.

rtl8139 is broken.  it should be clearing its memory.

someone posted a whole bunch of patches to memset() net drivers ...

> I saw discussion a little while ago regarding implementing a version of
> malloc that returns cleared memory - did this gain any traction?

i dont think anyone posted a patch.  it would make sense though to generalize 
the zalloc() code since some places are already doing it.
-mike
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