Messages in this thread | | | Date | Thu, 30 Oct 2014 10:07:32 +0000 | From | James Hogan <> | Subject | Re: [PATCH] MIPS: DMA: fix coherent alloc in non-coherent systems |
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Hi Leonid,
On 30/10/14 01:48, Leonid Yegoshin wrote: > A default dma_alloc_coherent() fails to alloc a coherent memory on non-coherent > systems in case of device->coherent_dma_mask covering the whole memory space. > > In case of non-coherent systems the coherent memory on MIPS is restricted by > size of un-cachable segment and should be located in ZONE_DMA.
Has this pretty much always been broken?
> @@ -81,6 +81,11 @@ static gfp_t massage_gfp_flags(const struct device *dev, gfp_t gfp) > dma_flag = __GFP_DMA; > else > #endif > +#ifdef CONFIG_ZONE_DMA > + if (coherent && !plat_device_is_coherent(dev))
Broken indentation. Please fix to use tabs.
> + dma_flag = __GFP_DMA; > + else > +#endif > #if defined(CONFIG_ZONE_DMA32) && defined(CONFIG_ZONE_DMA) > if (dev->coherent_dma_mask < DMA_BIT_MASK(32)) > dma_flag = __GFP_DMA;
Other than that, this patch looks okay to me (but those with more experience with MIPS DMA than me may know better).
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Thanks James
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