From 84ac0f09aee6c534a86ba8e2598f5e022772f0eb Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Thu, 2 Jan 2014 10:48:07 -0300
Subject: [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>

diff --git a/drivers/media/platform/omap3isp/ispstat.c b/drivers/media/platform/omap3isp/ispstat.c
index dba713f..4cf7eb1 100644
--- a/drivers/media/platform/omap3isp/ispstat.c
+++ b/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;
diff --git a/drivers/media/platform/omap3isp/ispstat.h b/drivers/media/platform/omap3isp/ispstat.h
index 8e76846..857f45e 100644
--- a/drivers/media/platform/omap3isp/ispstat.h
+++ b/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;
-- 
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