Re: [HOWTO] accessing the DMA mapped data

Hi Miller,

Thanks for replying.

You can eithe keep track of this yourself, or (depending upon
your usage) you might be able to use DMA pools, see
dma_pool_create() and friends.

I think you have not understood my question properly. My problem is, the layer above the driver will do dma_map_single on a kmalloc'ed buffer and passes the result (bus address) to the device driver. Now

the driver has to modify the contents of the the original buffer.
Is it possible to do that ??

-regards,
Mahesh

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