Messages in this thread | | | Date | Tue, 23 Feb 2016 16:30:03 +0100 | From | Rabin Vincent <> | Subject | Re: [PATCH 2/2] ARM: dma-mapping: fix alloc/free for coherent + CMA + gfp=0 |
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On Fri, Feb 19, 2016 at 02:50:52PM +0100, Michal Nazarewicz wrote: > I haven’t looked closely at the code, but why not: > > struct cma *cma = > if (!cma_release(dev_get_cma_area(dev), page, size >> PAGE_SHIFT)) { > // ... do whatever other non-CMA free > }
The page tables changes need to be done before we release the area with cma_release(). With the v2 patchset which I've sent to LAKML we won't need a new in_cma() function since we'll now record how we allocated the buffer and use this information in the free routine.
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