[media] omap3isp: stat: Store sg table in ispstat_buffer

The driver stores the IOMMU mapped iovm struct pointer in the buffer
structure but only needs the iovm sg table. Store the sg table instead
to prepare the migration to the DMA API.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/platform/omap3isp/ispstat.c

@@ -183,8 +183,8 @@ static void isp_stat_buf_sync_for_device(struct ispstat *stat,
 	if (ISP_STAT_USES_DMAENGINE(stat))
 		return;
 
-	dma_sync_sg_for_device(stat->isp->dev, buf->iovm->sgt->sgl,
-			       buf->iovm->sgt->nents, DMA_FROM_DEVICE);
+	dma_sync_sg_for_device(stat->isp->dev, buf->sgt->sgl,
+			       buf->sgt->nents, DMA_FROM_DEVICE);
 }
 
 static void isp_stat_buf_sync_for_cpu(struct ispstat *stat,
@@ -193,8 +193,8 @@ static void isp_stat_buf_sync_for_cpu(struct ispstat *stat,
 	if (ISP_STAT_USES_DMAENGINE(stat))
 		return;
 
-	dma_sync_sg_for_cpu(stat->isp->dev, buf->iovm->sgt->sgl,
-			    buf->iovm->sgt->nents, DMA_FROM_DEVICE);
+	dma_sync_sg_for_cpu(stat->isp->dev, buf->sgt->sgl,
+			    buf->sgt->nents, DMA_FROM_DEVICE);
 }
 
 static void isp_stat_buf_clear(struct ispstat *stat)
@@ -363,10 +363,9 @@ static void isp_stat_bufs_free(struct ispstat *stat)
 		if (!ISP_STAT_USES_DMAENGINE(stat)) {
 			if (IS_ERR_OR_NULL((void *)buf->dma_addr))
 				continue;
-			if (buf->iovm)
-				dma_unmap_sg(isp->dev, buf->iovm->sgt->sgl,
-					     buf->iovm->sgt->nents,
-					     DMA_FROM_DEVICE);
+			if (buf->sgt)
+				dma_unmap_sg(isp->dev, buf->sgt->sgl,
+					     buf->sgt->nents, DMA_FROM_DEVICE);
 			omap_iommu_vfree(isp->domain, isp->dev, buf->dma_addr);
 		} else {
 			if (!buf->virt_addr)
@@ -374,7 +373,7 @@ static void isp_stat_bufs_free(struct ispstat *stat)
 			dma_free_coherent(stat->isp->dev, stat->buf_alloc_size,
 					  buf->virt_addr, buf->dma_addr);
 		}
-		buf->iovm = NULL;
+		buf->sgt = NULL;
 		buf->dma_addr = 0;
 		buf->virt_addr = NULL;
 		buf->empty = 1;
@@ -407,7 +406,7 @@ static int isp_stat_bufs_alloc_iommu(struct ispstat *stat,
 			DMA_FROM_DEVICE))
 		return -ENOMEM;
 
-	buf->iovm = iovm;
+	buf->sgt = iovm->sgt;
 	buf->virt_addr = omap_da_to_va(stat->isp->dev, buf->dma_addr);
 
 	return 0;

drivers/media/platform/omap3isp/ispstat.h

@@ -46,7 +46,7 @@
 struct ispstat;
 
 struct ispstat_buffer {
-	struct iovm_struct *iovm;
+	const struct sg_table *sgt;
 	void *virt_addr;
 	dma_addr_t dma_addr;
 	struct timespec ts;