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mtd: OneNAND: Fix page offset handling at 2KiB pagesize

PATCH Applied Kyungmin Park 2 participants 2 messages Nov 2, 2010 – Nov 13, 2010 Memory technology devices (MTD)

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Kyungmin Park

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PATCH 1/1 mtd: OneNAND: Fix page offset handling at 2KiB pagesize

From: Kyungmin Park <[email protected]>

When use the 2KiB pagesize, it should be set the correct page offset.

Signed-off-by Kyungmin Park <[email protected]>

---

drivers/mtd/onenand/samsung.c +5 -2
index 0de7a05..a4c74a9 100644
@@ -651,7 +651,7 @@ static int s5pc110_read_bufferram(struct mtd_info *mtd, int area,
 	void __iomem *p;
 	void *buf = (void *) buffer;
 	dma_addr_t dma_src, dma_dst;
-	int err, page_dma = 0;
+	int err, ofs, page_dma = 0;
 	struct device *dev = &onenand->pdev->dev;
 
 	p = this->base + area;

@@ -677,10 +677,13 @@ static int s5pc110_read_bufferram(struct mtd_info *mtd, int area,
 		if (!page)
 			goto normal;
 
+		/* Page offset */
+		ofs = ((size_t) buf & ~PAGE_MASK);
 		page_dma = 1;
+
 		/* DMA routine */
 		dma_src = onenand->phys_base + (p - this->base);
-		dma_dst = dma_map_page(dev, page, 0, count, DMA_FROM_DEVICE);
+		dma_dst = dma_map_page(dev, page, ofs, count, DMA_FROM_DEVICE);
 	} else {
 		/* DMA routine */
 		dma_src = onenand->phys_base + (p - this->base);