On 2017-12-04 20:40, Rosen Penev wrote: > Qualcomm claims this is no-op for MIPS. Original commit message below: > > From: Ben Menchaca <ben.mench...@qca.qualcomm.com> > Date: Fri, 7 Jun 2013 11:19:08 -0500 > Subject: [ag71xx] DMA unmap FROM_DEVICE no-op for our arch > > The invalidate for FROM_DEVICE map/unmap pairs is done in the map. > The unmap is a no-op, but there is a cost for accessing that no-op > function through the large number of indirection layers presented > by the MIPS linux dma_ops. > > Signed-off-by: Ben Menchaca <ben.mench...@qca.qualcomm.com> > Signed-off-by: Rosen Penev <ros...@gmail.com> NACK for this patch. It's true that dma-unmap is a no-op for most MIPS devices, but I will take care of this in a generic way instead of merging this driver specific hack.
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