ad0: WARNING - WRITE_MUL write data underrun

[Soren Schmidt]

It seems Mark Knight wrote:
> Current from approximately 0500 BST on 16th September is giving me 
> errors like this from boot:
> 
> ad0: WARNING - WRITE_MUL write data underrun 8192>2048
> ad0: WARNING - WRITE_MUL write data underrun 8192>6144
> ad0: WARNING - WRITE_MUL write data underrun 8192>4096
> ad0: WARNING - WRITE_MUL write data underrun 8192>4096
> 
> Any thoughts?  Does this imply data corruption?

Something is odd here, ata_pio_write(request, length) is called with:

ata_pio_write(request, request->transfersize);

and there the test is done like this:

if (request->transfersize < length) {
        ata_prtdev(request->device, "WARNING - %s write data underrun %d>%d\n",

Maybe I just need some well earned sleep, but I cannot se how the warning
can happen at all, and yes you will have the missing bits filled with 0's.

-Søren