[U-Boot-Users] 83xx, FSL_UEC reducing boot latency, printf causing crash

[Joakim Tjernlund]

On Tue, 2007-12-18 at 19:58 -0800, Russell McGuire wrote:
> Kim,
> 
> I am getting around to helping test out this reduced latency patch.
> 
> Interesting I have found the boot cycle times are MUCH faster, however, is
> it supposed to continuously restart the auto-negotiation each time a
> ethernet access is performed? i.e. a new ping, or tftp download? For example
> if I issue a tftp load three times in a row, the 2nd time it will tear down
> the link and restart it. The third time it will crash, though I believe this
> is to do with the below mentioned printf issue.
> 
> I am looking into ways to optimize this, are there any updates to the patch
> before I start modifying things?
> 
> Another bug?? Not sure this is Ethernet specific but perhaps U-boot generic.
> Is that if I add printf() statements throughout the uec code I get total
> crashes of u-boot, i.e. bad traps that result in a back trace and board
> resets.

Kim sent me an updated patch after some feedback from me. I did two
more updates, one of them removes the AN for each transfer. The printf()
crash sounds familiar, perhaps it is gone now?

Patches attached.

The last 2 patches are on top of Kims.

   Jocke
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