Make dma_xfer() do DMA unmapping itself and fix handling
of failure cases.
Cc: David Woodhouse <[email protected]>
Cc: Vipin Kumar <[email protected]>
Cc: Tomasz Figa <[email protected]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
---
drivers/mtd/nand/fsmc_nand.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index 38d2624..679ede8 100644
--- a/drivers/mtd/nand/fsmc_nand.c
+++ b/drivers/mtd/nand/fsmc_nand.c
@@ -569,23 +569,22 @@ 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;
@@ -595,7 +594,7 @@ 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);
@@ -606,10 +605,17 @@ 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;
}
/*
--
1.8.0
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