Re: [Intel-IOMMU 02/10] Library routine for pre-allocat pool handling

[Ashok Raj]

On Mon, Jun 11, 2007 at 02:14:49PM -0700, Andrew Morton wrote:
> > 
> > Again, if dma_map_{single|sg} API's fails due to 
> > failure to allocate memory, the only thing that can
> > be done is to panic as this is what few of the other 
> > IOMMU implementation is doing today. 
> 
> If the only option is to panic then something's busted.  If it's network IO
> then there should be a way of dropping the frame.  If it's disk IO then we
> should report the failure and cause an IO error.

Just looking at the code.. appears that quite a few popular ones (or should say most) dont even look at the dma_addr_t returned to check for failure.

Thats going to be another major cleanup work.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/