Messages in this thread | | | Date | Tue, 16 Aug 2016 19:42:53 +0100 | From | Mark Brown <> | Subject | Re: [PATCH v5] spi: spi-ti-qspi: Add DMA support for QSPI mmap read |
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On Tue, Aug 09, 2016 at 06:20:01PM +0530, Vignesh R wrote: > >
> According to this thread[1], converting virtual address > pointer into scatterlist which is then DMA mapped is unsafe on systems > with certain cache architecture. Hence, I added code to handle kmap > buffers inside the driver rather than updating generic spi-core code.
That's saying that things that aren't covered aren't DMAable safely at all which is a more general issue...
> If its okay to update the spi_map_buf() to handle kmap buffers as above > then I can submit the patch accordingly.
Yes, the whole point is that this is all in generic code so drivers don't need to worry about it. [unhandled content-type:application/pgp-signature] | |