ioremap on powerpc question

Cameron, Steve Steve.Cameron at
Thu Jul 18 08:39:24 EST 2002

I wrote:
> Hmm, I continue to have difficulties...
> Matt Porter wrote:
> > On Mon, Jul 15, 2002 at 01:58:21PM -0500, Cameron, Steve wrote:
> > > It blows up with a machine check.
> > Try this patch:
> when I attempt to DMA into the physical address with my PCI device,
> it is as if the DMA never occurs.  Prior to the DMA, I fill the
> buffer with 0x55's, and after the DMA, the 0x55's are still there.
> BTW, my device seems happy with the physical addresses I pass it,
And now I see, I have (at least) two errors, one hiding the other.  In fact
my PCI device was _not_ happy with those addresses at all, (because they
were wrong, I botched the swapping) and also my code to check for this device's
unhappiness happened to be broken...

So, now I think ioremap is likely now working with this patch.

Thanks, and sorry for all the noise.

(still not sure about my problems with alloc_bootmem_pages, but
not too worried about it now.)

-- steve

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