From: Laurent Pinchart Date: Tue, 27 Jan 2015 13:58:53 +0000 (+0200) Subject: dmaengine: rcar-dmac: Allocate hardware descriptors with DMAC device X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=6a634808e315a148dfe8db925215cbaaa3ea1831;p=deliverable%2Flinux.git dmaengine: rcar-dmac: Allocate hardware descriptors with DMAC device When wired to an IOMMU to access data, the DMAC accesses the hardware descriptors through the IOMMU as well. We're using the DMA mapping API to allocate the descriptors, but with a NULL device at the moment, which prevents IOMMU mappings from being created. Fix this by passing the DMAC device instead. Signed-off-by: Laurent Pinchart Acked-by: Geert Uytterhoeven Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c index 2eb65e1bf938..bb93038c48b9 100644 --- a/drivers/dma/sh/rcar-dmac.c +++ b/drivers/dma/sh/rcar-dmac.c @@ -655,8 +655,8 @@ static void rcar_dmac_realloc_hwdesc(struct rcar_dmac_chan *chan, return; if (desc->hwdescs.mem) { - dma_free_coherent(NULL, desc->hwdescs.size, desc->hwdescs.mem, - desc->hwdescs.dma); + dma_free_coherent(chan->chan.device->dev, desc->hwdescs.size, + desc->hwdescs.mem, desc->hwdescs.dma); desc->hwdescs.mem = NULL; desc->hwdescs.size = 0; } @@ -664,8 +664,8 @@ static void rcar_dmac_realloc_hwdesc(struct rcar_dmac_chan *chan, if (!size) return; - desc->hwdescs.mem = dma_alloc_coherent(NULL, size, &desc->hwdescs.dma, - GFP_NOWAIT); + desc->hwdescs.mem = dma_alloc_coherent(chan->chan.device->dev, size, + &desc->hwdescs.dma, GFP_NOWAIT); if (!desc->hwdescs.mem) return;