Re: panic in bus_dma_tag_destroy()

On Wed, Oct 13, 2004 at 10:55:26AM -0700, Matthew Dillon wrote:
> :I'd prefer keeping the malloc in the bus_dma_tag_create. I think we
> :have two options here. The first is to explicitly specify the overall
> :number of segments in the parents too. This would waste some kernel memory.
> 
>     We can't do this because the drivers have no clue what the actual limits
>     for the parents are.

Huch? The parent tag is allocated by the bus frontends. It works for almost
all drivers, but I guess there are a few drivers where the author was too
lazy to do the math.

> 
> :Alternatively we can change the contenders to specify a maximum number of
> :segments of 0 or special case BUS_SPACE_UNRESTRICTED.
> 
>     We could special-case 0.   That would be maybe ~2 lines of code or
>     something similarly trivial, and makes a lot more sense then what the
>     drivers are doing now.

Sounds good.

Joerg

> 
> 					-Matt
> 					Matthew Dillon 
> 					<[e-mail]>