2012-08-06 10:13:23

by Qiang Liu

Subject: [PATCH v6 3/8] fsl-dma: add fsl_dma_free_descriptor() to reduce code duplication

From: Qiang Liu <[email protected]>

There are several places where descriptors are freed using identical
code. Put this code into a function to reduce code duplication.

Cc: Dan Williams <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Vinod Koul <[email protected]>
Signed-off-by: Ira W. Snyder <[email protected]>
---
drivers/dma/fsldma.c | 38 ++++++++++++++++++++------------------
1 files changed, 20 insertions(+), 18 deletions(-)

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 4f2f212..d4720d3 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -427,6 +427,21 @@ static dma_cookie_t fsl_dma_tx_submit(struct dma_async_tx_descriptor *tx)
}

/**
+ * fsl_dma_free_descriptor - Free descriptor from channel's DMA pool.
+ * @chan : Freescale DMA channel
+ * @desc: descriptor to be freed
+ */
+static void fsl_dma_free_descriptor(struct fsldma_chan *chan,
+ struct fsl_desc_sw *desc)
+{
+ list_del(&desc->node);
+#ifdef FSL_DMA_LD_DEBUG
+ chan_dbg(chan, "LD %p free\n", desc);
+#endif
+ dma_pool_free(chan->desc_pool, desc, desc->async_tx.phys);
+}
+
+/**
* fsl_dma_alloc_descriptor - Allocate descriptor from channel's DMA pool.
* @chan : Freescale DMA channel
*
@@ -500,13 +515,8 @@ static void fsldma_free_desc_list(struct fsldma_chan *chan,
{
struct fsl_desc_sw *desc, *_desc;

- list_for_each_entry_safe(desc, _desc, list, node) {
- list_del(&desc->node);
-#ifdef FSL_DMA_LD_DEBUG
- chan_dbg(chan, "LD %p free\n", desc);
-#endif
- dma_pool_free(chan->desc_pool, desc, desc->async_tx.phys);
- }
+ list_for_each_entry_safe(desc, _desc, list, node)
+ fsl_dma_free_descriptor(chan, desc);
}

static void fsldma_free_desc_list_reverse(struct fsldma_chan *chan,
@@ -514,13 +524,8 @@ static void fsldma_free_desc_list_reverse(struct fsldma_chan *chan,
{
struct fsl_desc_sw *desc, *_desc;

- list_for_each_entry_safe_reverse(desc, _desc, list, node) {
- list_del(&desc->node);
-#ifdef FSL_DMA_LD_DEBUG
- chan_dbg(chan, "LD %p free\n", desc);
-#endif
- dma_pool_free(chan->desc_pool, desc, desc->async_tx.phys);
- }
+ list_for_each_entry_safe_reverse(desc, _desc, list, node)
+ fsl_dma_free_descriptor(chan, desc);
}

/**
@@ -855,10 +860,7 @@ static void fsldma_cleanup_descriptor(struct fsldma_chan *chan,
dma_unmap_page(dev, src, len, DMA_TO_DEVICE);
}

-#ifdef FSL_DMA_LD_DEBUG
- chan_dbg(chan, "LD %p free\n", desc);
-#endif
- dma_pool_free(chan->desc_pool, desc, txd->phys);
+ fsl_dma_free_descriptor(chan, desc);
}

/**
--
1.7.5.1