[PATCH 1/2] dmatest: implement two helpers to unmap dma memory

From: Andy Shevchenko
Date: Mon Dec 10 2012 - 06:38:01 EST


The unmap_src() and unmap_dst() will be used later as well.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
drivers/dma/dmatest.c | 27 +++++++++++++++++----------
1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 3e777d2..b515343 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -236,6 +236,20 @@ static unsigned int min_odd(unsigned int x, unsigned int y)
return val % 2 ? val : val - 1;
}

+static inline void unmap_src(struct device *dev, dma_addr_t *addr, size_t len,
+ unsigned int count)
+{
+ while (count--)
+ dma_unmap_single(dev, addr[count], len, DMA_TO_DEVICE);
+}
+
+static inline void unmap_dst(struct device *dev, dma_addr_t *addr, size_t len,
+ unsigned int count)
+{
+ while (count--)
+ dma_unmap_single(dev, addr[count], len, DMA_BIDIRECTIONAL);
+}
+
/*
* This function repeatedly tests DMA transfers of various lengths and
* offsets for a given operation type until it is told to exit by
@@ -394,13 +408,8 @@ static int dmatest_func(void *data)
}

if (!tx) {
- for (i = 0; i < src_cnt; i++)
- dma_unmap_single(dev->dev, dma_srcs[i], len,
- DMA_TO_DEVICE);
- for (i = 0; i < dst_cnt; i++)
- dma_unmap_single(dev->dev, dma_dsts[i],
- test_buf_size,
- DMA_BIDIRECTIONAL);
+ unmap_src(dev->dev, dma_srcs, len, src_cnt);
+ unmap_dst(dev->dev, dma_dsts, test_buf_size, dst_cnt);
pr_warning("%s: #%u: prep error with src_off=0x%x "
"dst_off=0x%x len=0x%x\n",
thread_name, total_tests - 1,
@@ -454,9 +463,7 @@ static int dmatest_func(void *data)
}

/* Unmap by myself (see DMA_COMPL_SKIP_DEST_UNMAP above) */
- for (i = 0; i < dst_cnt; i++)
- dma_unmap_single(dev->dev, dma_dsts[i], test_buf_size,
- DMA_BIDIRECTIONAL);
+ unmap_dst(dev->dev, dma_dsts, test_buf_size, dst_cnt);

error_count = 0;

--
1.7.10.4

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