Fixing bus_dma_tag_create(NULL, ?).

John-Mark Gurney jmg at
Mon Oct 31 20:15:19 UTC 2011

Edward Tomasz Napiera?a wrote this message on Mon, Oct 31, 2011 at 14:52 +0100:
> On sparc64, calling bus_dma_tag_create(9) with NULL tag will result in instant
> panic due to KASSERT.  Patch below fixes all the instances I could find.  It also fixes
> several places unrelated to sparc64, just to give a good example.
> Now, the problem is - the changes are trivial and mechanical, but I have no way
> to test most of it, simply because I don't have hardware handled by these drivers.
> And I'm not really sure how to proceed from this point.  Any ideas?
> Patch can be found at:

Maybe posting this patch to -current and -stable would be best.  It
would give more people the ability to review and test, and be a good
reminder to the others that this is the correct usage.

I did take a quick look at the patch, and it does look correct.


  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."

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