radeon_drv and ATI R423

[Benjamin Herrenschmidt]

On Wed, 2006-02-15 at 15:01 -0600, Mark Maule wrote:

> If I remove the store to RADEON_DST_LINE_END, my startup hang goes away.
> 
> What I see on an analyzer trace is that after the RADEON_DST_LINE_END store,
> the card is generating a 2-byte DMA write to bus address 0, which
> never completes and I assume wedges the card.
> 
> I'm not using the CP or any DMA, just trying to use basic PIO acceleration.
> 
> Is radeon_drv supposed to work with the 423?  I assume it is since I find it
> referenced in the code as CHIP_FAMILY_R420.

That's very intersting ! I love when people can debug with an
analyzer ;)

You found a real bug here, I'll fix it and commit along with the rest of
my patches later today. Thanks !

Ben.