Re: [PATCH/RFC] SPI: async message handing library update

[Vitaly Wool]

David,

> 			if (t->len) {
> 				/* FIXME if bitbang->use_dma, dma_map_single()
> 				 * before the transfer, and dma_unmap_single()
> 				 * afterwards, for either or both buffers...
> 				 */
>  
please *please* *_please_*!!! don't do it! :)
Let the controller driver do it *only in case it's not working in PIO!*

Vitaly
-
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/