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

From: Ashok Raj
Date: Mon Jun 11 2007 - 17:43:34 EST

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.
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