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MIPS: DMA: Explain the lack of special handling for R14000/R16000.

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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Ralf Baechle 2014-11-11 22:22:03 +01:00
parent 341097f17c
commit 0dc294c05d
1 changed files with 5 additions and 0 deletions
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5
arch/mips/mm/dma-default.c
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@ -61,6 +61,11 @@ static inline struct page *dma_addr_to_page(struct device *dev,
* Warning on the terminology - Linux calls an uncached area coherent;
* MIPS terminology calls memory areas with hardware maintained coherency
* coherent.
*
* Note that the R14000 and R16000 should also be checked for in this
* condition. However this function is only called on non-I/O-coherent
* systems and only the R10000 and R12000 are used in such systems, the
* SGI IP28 Indigo² rsp. SGI IP32 aka O2.
*/
static inline int cpu_needs_post_dma_flush(struct device *dev)
{