From d1806a5c4d2248d2799f4367dbdb1800be94a26f Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Mon, 5 Nov 2012 10:00:14 +0000 Subject: mtd: fsmc_nand: add missing DMA unmap to dma_xfer() Make dma_xfer() do DMA unmapping itself and fix handling of failure cases. Cc: David Woodhouse Cc: Vipin Kumar Cc: Tomasz Figa Signed-off-by: Bartlomiej Zolnierkiewicz Signed-off-by: Kyungmin Park Signed-off-by: Dan Williams --- drivers/mtd/nand/fsmc_nand.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) (limited to 'drivers/mtd/nand/fsmc_nand.c') diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c index 1d7446434b0e..a66576863e53 100644 --- a/drivers/mtd/nand/fsmc_nand.c +++ b/drivers/mtd/nand/fsmc_nand.c @@ -573,23 +573,22 @@ static int dma_xfer(struct fsmc_nand_data *host, void *buffer, int len, dma_dev = chan->device; dma_addr = dma_map_single(dma_dev->dev, buffer, len, direction); + flags |= DMA_COMPL_SKIP_SRC_UNMAP | DMA_COMPL_SKIP_DEST_UNMAP; + if (direction == DMA_TO_DEVICE) { dma_src = dma_addr; dma_dst = host->data_pa; - flags |= DMA_COMPL_SRC_UNMAP_SINGLE | DMA_COMPL_SKIP_DEST_UNMAP; } else { dma_src = host->data_pa; dma_dst = dma_addr; - flags |= DMA_COMPL_DEST_UNMAP_SINGLE | DMA_COMPL_SKIP_SRC_UNMAP; } tx = dma_dev->device_prep_dma_memcpy(chan, dma_dst, dma_src, len, flags); - if (!tx) { dev_err(host->dev, "device_prep_dma_memcpy error\n"); - dma_unmap_single(dma_dev->dev, dma_addr, len, direction); - return -EIO; + ret = -EIO; + goto unmap_dma; } tx->callback = dma_complete; @@ -599,7 +598,7 @@ static int dma_xfer(struct fsmc_nand_data *host, void *buffer, int len, ret = dma_submit_error(cookie); if (ret) { dev_err(host->dev, "dma_submit_error %d\n", cookie); - return ret; + goto unmap_dma; } dma_async_issue_pending(chan); @@ -610,10 +609,17 @@ static int dma_xfer(struct fsmc_nand_data *host, void *buffer, int len, if (ret <= 0) { chan->device->device_control(chan, DMA_TERMINATE_ALL, 0); dev_err(host->dev, "wait_for_completion_timeout\n"); - return ret ? ret : -ETIMEDOUT; + if (!ret) + ret = -ETIMEDOUT; + goto unmap_dma; } - return 0; + ret = 0; + +unmap_dma: + dma_unmap_single(dma_dev->dev, dma_addr, len, direction); + + return ret; } /* -- cgit v1.2.3