Subject: Re: isa_dmastart return value ignored?
To: Jason R Thorpe <>
From: Leo Weppelman <>
List: tech-kern
Date: 02/22/2001 22:13:32
On Thu, Feb 22, 2001 at 08:45:34AM -0800, Jason R Thorpe wrote:
> On Thu, Feb 22, 2001 at 09:15:11AM +0100, Leo Weppelman wrote:
>  > A quick grep through dev/isa showed that none of the drivers using
>  > isa_dmastart() is actually checking the results. This makes me wonder if
>  > I am doing something wrong...
> When the DMA map is created, you need to make sure to allocate a bounce
> buffer for data that could end up being fragmented across multiple pages.
> See the various isadma_machdep.c files or the i386 isa_machdep.c.

Ah, yes! Thanks a lot!

I already had the feeling I was overlooking something ;-)