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SubjectRe: [PATCH 1/2] USB: HCD: Add driver hooks for (un)?map_urb_for_dma
On Thu, Jan 20, 2011 at 01:41:54PM -0800, Robert Morell wrote:
> Provide optional hooks for the host controller driver to override the
> default DMA mapping and unmapping routines. In general, these shouldn't
> be necessary unless the host controller has special DMA requirements,
> such as alignment contraints. If these are not specified, the
> general usb_hcd_(un)?map_urb_for_dma functions will be used instead.
> Also, pass the status to unmap_urb_for_dma so it can know whether the
> DMA buffer has been overwritten.
> Finally, add a flag to be used by these implementations if they
> allocated a temporary buffer so it can be freed properly when unmapping.
> Signed-off-by: Robert Morell <>

I'd like to get an ACK from Alan before applying this one, and ideally
also from David and Sarah as they know the HCD code also.



greg k-h

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