zynq_fpga: use sgtable-based scatterlist wrappers

Use common wrappers operating directly on the struct sg_table objects to
fix incorrect use of statterlists related calls. dma_unmap_sg() function
has to be called with the number of elements originally passed to the
dma_map_sg() function, not the one returned in sgtable's nents.

CC: [email protected]
Fixes: 425902f ("fpga zynq: Use the scatterlist interface")
Signed-off-by: Marek Szyprowski <[email protected]>
Reviewed-by: Jason Gunthorpe <[email protected]>
Reviewed-by: Xu Yilun <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Xu Yilun <[email protected]>

Author: mszyprow

drivers/fpga/zynq-fpga.c

@@ -406,7 +406,7 @@ static int zynq_fpga_ops_write(struct fpga_manager *mgr, struct sg_table *sgt)
 	}
 
 	priv->dma_nelms =
-	    dma_map_sg(mgr->dev.parent, sgt->sgl, sgt->nents, DMA_TO_DEVICE);
+	    dma_map_sgtable(mgr->dev.parent, sgt, DMA_TO_DEVICE, 0);
 	if (priv->dma_nelms == 0) {
 		dev_err(&mgr->dev, "Unable to DMA map (TO_DEVICE)\n");
 		return -ENOMEM;
@@ -478,7 +478,7 @@ static int zynq_fpga_ops_write(struct fpga_manager *mgr, struct sg_table *sgt)
 	clk_disable(priv->clk);
 
 out_free:
-	dma_unmap_sg(mgr->dev.parent, sgt->sgl, sgt->nents, DMA_TO_DEVICE);
+	dma_unmap_sgtable(mgr->dev.parent, sgt, DMA_TO_DEVICE, 0);
 	return err;
 }